pauseCircuit on page lifecycle api event does not finish

[davhdavh]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Server log when pauseCircuit on freeze

{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Pausing circuit with id Iw5R2Vb8ddM4WBokpbmrHm8VpUizf2bAFIxclHaVUts from connection IayowWUkJ5qQ9OuEYZ5VTg.","TraceID":"009d7187fdc7025597acd0507fa07939","SpanID":"6bacc7c38cc28e4f","Timestamp":"2025-09-11T10:55:04.9146347Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Infrastructure.PersistentStateValueProvider","Message":"Persisting value for storage key 'GY+utGHxVFNiiAOlJajMCoTIQigGKM0Y4/Dx8UZ1sOI=' of type 'IEnumerable`1' from component 'SearchPage' for property 'Selected'","TraceID":"009d7187fdc7025597acd0507fa07939","SpanID":"6bacc7c38cc28e4f","Timestamp":"2025-09-11T10:55:04.9149307Z"}

and restore

{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Invoking instance method 'DispatchEventAsync' on instance '1' with callback id '6'.","TraceID":"7beee1ba41e003f3e053f432fe97773f","SpanID":"abd3a238dd2a1e80","Timestamp":"2025-09-11T10:55:27.0238394Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer","Message":"Sending render batch 26 of size 120 bytes to client IayowWUkJ5qQ9OuEYZ5VTg.","TraceID":"7beee1ba41e003f3e053f432fe97773f","SpanID":"abd3a238dd2a1e80","Timestamp":"2025-09-11T10:55:27.0244261Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteJSRuntime","Message":"Invocation of 'DispatchEventAsync' on reference '1' with callback id '6' completed successfully.","TraceID":"7beee1ba41e003f3e053f432fe97773f","SpanID":"abd3a238dd2a1e80","Timestamp":"2025-09-11T10:55:27.0245470Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Disposing circuit 'Iw5R2Vb8ddM4WBokpbmrHm8VpUizf2bAFIxclHaVUts' started.","TraceID":"009d7187fdc7025597acd0507fa07939","SpanID":"6bacc7c38cc28e4f","Timestamp":"2025-09-11T10:55:27.0370825Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Circuit id 'Iw5R2Vb8ddM4WBokpbmrHm8VpUizf2bAFIxclHaVUts' disconnected from connection 'IayowWUkJ5qQ9OuEYZ5VTg'.","TraceID":"009d7187fdc7025597acd0507fa07939","SpanID":"6bacc7c38cc28e4f","Timestamp":"2025-09-11T10:55:27.0371209Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Closing circuit with id 'Iw5R2Vb8ddM4WBokpbmrHm8VpUizf2bAFIxclHaVUts'.","TraceID":"009d7187fdc7025597acd0507fa07939","SpanID":"6bacc7c38cc28e4f","Timestamp":"2025-09-11T10:55:27.0371309Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Disposing circuit 'Iw5R2Vb8ddM4WBokpbmrHm8VpUizf2bAFIxclHaVUts' succeeded.","TraceID":"009d7187fdc7025597acd0507fa07939","SpanID":"6bacc7c38cc28e4f","Timestamp":"2025-09-11T10:55:27.0830157Z"}

Client side, the event handler for freeze does not log the line after Blazor.pauseCircuit, which probably means the freeze event does not support async methods.

The following wake event then has a race condition with the freeze, which causes it to fail to resume because server thinks it didn't finish the pause, and then the freeze handler finish disconnecting again leaving the UI in a disconnected state with no knowledge that it is disconnected and the UI components doesnt show up.

Expected Behavior

Server log when pauseCircuit on hidden

{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Pausing circuit with id rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8 from connection 64giwj_2dFGG4073iJ1exg.","TraceID":"281958c54cd13f65595c1da70c07e61e","SpanID":"d18c619dba6be120","Timestamp":"2025-09-11T10:52:15.9959922Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Infrastructure.PersistentStateValueProvider","Message":"Persisting value for storage key 'GY+utGHxVFNiiAOlJajMCoTIQigGKM0Y4/Dx8UZ1sOI=' of type 'IEnumerable`1' from component 'SearchPage' for property 'Selected'","TraceID":"281958c54cd13f65595c1da70c07e61e","SpanID":"d18c619dba6be120","Timestamp":"2025-09-11T10:52:15.9962899Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Disposing circuit 'rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8' started.","TraceID":"281958c54cd13f65595c1da70c07e61e","SpanID":"d18c619dba6be120","Timestamp":"2025-09-11T10:52:15.9995095Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Attempting to disconnect circuit with id rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8 from connection 64giwj_2dFGG4073iJ1exg.","TraceID":"5ec521ceaf61172490060163321f1fe4","SpanID":"020424fbaea106b2","Timestamp":"2025-09-11T10:52:15.9995096Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Failed to disconnect circuit with id rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8. The circuit is not active.","TraceID":"5ec521ceaf61172490060163321f1fe4","SpanID":"020424fbaea106b2","Timestamp":"2025-09-11T10:52:15.9995346Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Circuit id 'rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8' disconnected from connection '64giwj_2dFGG4073iJ1exg'.","TraceID":"281958c54cd13f65595c1da70c07e61e","SpanID":"d18c619dba6be120","Timestamp":"2025-09-11T10:52:15.9995395Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Closing circuit with id 'rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8'.","TraceID":"281958c54cd13f65595c1da70c07e61e","SpanID":"d18c619dba6be120","Timestamp":"2025-09-11T10:52:15.9995545Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Disposing circuit 'rw0uZzqhEng17WeRf43GqzibcV7GhLpigjdUMv-kdP8' succeeded.","TraceID":"281958c54cd13f65595c1da70c07e61e","SpanID":"d18c619dba6be120","Timestamp":"2025-09-11T10:52:16.0664999Z"}

and restore

{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteJSRuntime","Message":"Begin invoke JS interop '2': 'Blazor._internal.attachWebRendererInterop'","TraceID":"c331c81212c969cb21bca865eded5727","SpanID":"8ccaf6accb8e1a2e","Timestamp":"2025-09-11T10:52:35.4308771Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitFactory","Message":"Created circuit Tdg9ZV8_AclJ0k-Jj35jz5OJstNfmWhm1HTwk268MNA for connection BTVsppE-fYyxQU0MpzaiSw","TraceID":"c331c81212c969cb21bca865eded5727","SpanID":"8ccaf6accb8e1a2e","Timestamp":"2025-09-11T10:52:35.4309989Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Circuit initialization started.","TraceID":"c331c81212c969cb21bca865eded5727","SpanID":"8ccaf6accb8e1a2e","Timestamp":"2025-09-11T10:52:35.4310368Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Circuit initialization succeeded.","TraceID":"c331c81212c969cb21bca865eded5727","SpanID":"8ccaf6accb8e1a2e","Timestamp":"2025-09-11T10:52:35.4310490Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"The JS interop call with callback id '2' succeeded.","TraceID":"9f752067b68960217aa575452ca58acd","SpanID":"60491be37e61649b","Timestamp":"2025-09-11T10:52:35.4331201Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Update root components started.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4346757Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Opening circuit with id 'Tdg9ZV8_AclJ0k-Jj35jz5OJstNfmWhm1HTwk268MNA'.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4348509Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Circuit id 'Tdg9ZV8_AclJ0k-Jj35jz5OJstNfmWhm1HTwk268MNA' connected using connection 'BTVsppE-fYyxQU0MpzaiSw'.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4348813Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer","Message":"Sending render batch 2 of size 897 bytes to client BTVsppE-fYyxQU0MpzaiSw.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4350999Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer","Message":"Sending render batch 3 of size 37180 bytes to client BTVsppE-fYyxQU0MpzaiSw.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4376567Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer","Message":"Sending render batch 4 of size 188975 bytes to client BTVsppE-fYyxQU0MpzaiSw.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4427346Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer","Message":"Sending render batch 5 of size 2287 bytes to client BTVsppE-fYyxQU0MpzaiSw.","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4431672Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Infrastructure.PersistentStateValueProvider","Message":"Restored value from persistent state for storage key 'GY+utGHxVFNiiAOlJajMCoTIQigGKM0Y4/Dx8UZ1sOI=' of type 'IEnumerable`1' for component 'null' for property 'Selected'","TraceID":"2087fd11ccabf3f18ae9432008455821","SpanID":"748fa3f4e57b81b4","Timestamp":"2025-09-11T10:52:35.4433408Z"}

Steps To Reproduce

This will use freeze on browsers that support page lifecycle API (ie chrome) and hidden on others (ie safari and firefox).
Replace ReconnectModal.razor.js in new dotnet 10 blazor project.

// ---------------- UI wiring (Blazor reconnect modal) ----------------
const reconnectModal = document.getElementById("components-reconnect-modal");
reconnectModal.addEventListener("components-reconnect-state-changed", handleReconnectStateChanged);

const retryButton = document.getElementById("components-reconnect-button");
retryButton.addEventListener("click", retry);

const resumeButton = document.getElementById("components-resume-button");
resumeButton.addEventListener("click", resumeClick);

function handleReconnectStateChanged(event) {
 if (event.detail.state === "show") {
  reconnectModal.showModal();
 } else if (event.detail.state === "hide") {
  reconnectModal.close();
 } else if (event.detail.state === "failed" || event.detail.state === "rejected") {
  location.reload();
 }
}

let inRetry = false;

async function retry() {
 if (inRetry) return;

 try {
  // Blazor reconnect contract:
  //  - true  => success (reconnected)
  //  - false => reached server but circuit unknown -> try resumeCircuit()
  //  - throw => couldn't reach server
  console.log("Attempting to reconnect");
  const successful = await Blazor.reconnect();
  if (!successful) {
   console.log("reconnect failed - Attempting to resume");
   const resumeSuccessful = await Blazor.resumeCircuit();
   if (!resumeSuccessful) {
    console.log("resume failed - reloading");
    location.reload();
   } else {
    console.log("resume success");
    reconnectModal.close();
   }
  } else {
    console.log("reconnect success");
  }
 } catch {
  // Server currently unreachable → retry when user brings tab to foreground
  console.log("Failed to reconnect");
 } finally {
  inRetry = false;
 }
}
async function resumeClick() {
 try {
  const successful = await Blazor.resumeCircuit();
  if (!successful) location.reload();
 } catch {
  location.reload();
 }
}

// --------------- Session actions used by the state machine ---------------
async function suspend(reason) {
  console.log(`Pausing circuit`);
  await Blazor.pauseCircuit(); //<-- problem here
  console.log(`Paused circuit`); //<-- never shown
}

async function resumeFromSuspend(nextState) {
 console.log(`Resume from suspend`);
 await retry();
}

async function drop() {
  console.log(`Discarding session`);
  await Blazor.disconnect();
}

// ---------------- Guideline state machine (active/passive/hidden/frozen/terminated) ----------------
const getState = () => {
 if (document.visibilityState === 'hidden') return 'hidden';
 if (document.hasFocus()) return 'active';
 return 'passive';
};

let state = getState();
let wasSuspended = false;
const supportsFreeze = 'onfreeze' in document;
const opts = { capture: true };

const stateChange = (nextState) => {
 const prevState = state;
 if (nextState === prevState) return;

 console.log(`State change: ${prevState} >>> ${nextState}`);

 // --- Suspend ---
 if (supportsFreeze) {
  if (nextState === 'frozen' && !wasSuspended) {
   wasSuspended = true;
   suspend('freeze');
  }
 } else {
  if (nextState === 'hidden' && !wasSuspended) {
   wasSuspended = true;
   suspend('hidden');
  }
 }

 // --- Wake (back to active/passive) ---
 if (wasSuspended && (nextState === 'active' || nextState === 'passive')) {
  wasSuspended = false;
  resumeFromSuspend(nextState);
 }

 // --- Drop (leaving/unload) ---
 if (nextState === 'terminated') {
  drop();
 }

 state = nextState;
};

// Lifecycle listeners following your guideline
['pageshow', 'focus', 'blur', 'visibilitychange', 'resume'].forEach((type) => {
 window.addEventListener(type, () => stateChange(getState()), opts);
});

// freeze → always 'frozen' (preferred suspend trigger if supported)
window.addEventListener('freeze', () => {
 stateChange('frozen');
}, opts);

// pagehide → 'frozen' (bfcache) or 'terminated' (leaving/unload)
window.addEventListener('pagehide', (event) => {
 stateChange(event.persisted ? 'frozen' : 'terminated');
}, opts);

Exceptions (if any)

No response

.NET Version

10.0.100-rc.1.25451.107

Anything else?

No response

[javiercn]

@davhdavh thanks for contacting us.

Can you provide a minimal repro provide a minimal repro project that illustrates the issue?

[javiercn]

@davhdavh you need to capture the promise from suspend and await that inside resumeFromSuspend

async function suspend(reason) {
  console.log(`Pausing circuit`);
  await Blazor.pauseCircuit(); //<-- problem here
  console.log(`Paused circuit`); //<-- never shown
}

async function resumeFromSuspend(nextState) {
 console.log(`Resume from suspend`);
 await retry();
}

[davhdavh]

I tried that, and it also works if you immediately visit the page again. If you wait just a minute or two until the connection would normally have timed out, the resume fails. I assume the problem is that the state server side is not properly marked as ready for resume, and thus fails to resume.

let evt = null;

// --------------- Session actions used by the state machine ---------------
async function suspend(reason) {
  console.log(`Pausing circuit`);
  evt = Blazor.pauseCircuit();
}

async function resumeFromSuspend(nextState) {
 console.log(`Resume from suspend`);
 try {
  if (evt !== null)
   await evt;
 } catch {
  //ignore
 }
 finally {
  evt = null;
 }
 await retry();
}

As you can see, the logs show that the start is the same, but the disconnect request doesn't come until you reopen the page, and by then the server is confused and registers the circuit id as failed and then the subsequent resume fails totally.

{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Pausing circuit with id 4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY from connection Ha7bfOm420edRg_z34HVBA.","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:00:37.2789424Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Infrastructure.PersistentStateValueProvider","Message":"Persisting value for storage key 'GY+utGHxVFNiiAOlJajMCoTIQigGKM0Y4/Dx8UZ1sOI=' of type 'IEnumerable`1' from component 'SearchPage' for property 'Selected'","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:00:37.3181771Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Attempting to disconnect circuit with id 4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY from connection Ha7bfOm420edRg_z34HVBA.","TraceID":"e7bc265a6f0b956833e4323a6d94e0cb","SpanID":"65f4789f0c27f72f","Timestamp":"2025-09-12T03:41:43.4385835Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Failed to disconnect circuit with id 4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY. The circuit is not active.","TraceID":"e7bc265a6f0b956833e4323a6d94e0cb","SpanID":"65f4789f0c27f72f","Timestamp":"2025-09-12T03:41:43.4395150Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Failed to save state to client in circuit '4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY'.","Exception":"System.IO.IOException: Connection 'Ha7bfOm420edRg_z34HVBA' disconnected.\r\n   at Microsoft.AspNetCore.SignalR.DefaultHubLifetimeManager`1.InvokeConnectionAsync[T](String connectionId, String methodName, Object[] args, CancellationToken cancellationToken)\r\n   at Microsoft.AspNetCore.SignalR.Internal.HubCallerClients.SingleClientProxy.InvokeCoreAsync[T](String method, Object[] args, CancellationToken cancellationToken)\r\n   at Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost.SendPersistedStateToClient(String rootComponents, String applicationState, CancellationToken cancellation)","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:41:43.4447709Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.ICircuitPersistenceProvider","Message":"Pausing circuit with ID 4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:41:43.4485496Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Disposing circuit '4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY' started.","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:41:43.5107900Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Circuit id '4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY' disconnected from connection 'Ha7bfOm420edRg_z34HVBA'.","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:41:43.5127038Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Closing circuit with id '4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY'.","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:41:43.5140367Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost","Message":"Disposing circuit '4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY' succeeded.","TraceID":"73b3a6cd7bd26dcbf2d7c0ee4c19dc4f","SpanID":"d4f165dea29a9c05","Timestamp":"2025-09-12T03:41:43.6164625Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Attempting to reconnect to Circuit with secret 4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY.","TraceID":"a97b1cb3fda9ff0b2d2203dcebd0322f","SpanID":"32ae6c7c8f31228c","Timestamp":"2025-09-12T03:58:41.4065771Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry","Message":"Failed to find a matching circuit for circuit secret 4b4vyrMjnTKSZNT72LpJnjaarsoxp4frHhFwPhpreGY.","TraceID":"a97b1cb3fda9ff0b2d2203dcebd0322f","SpanID":"32ae6c7c8f31228c","Timestamp":"2025-09-12T03:58:41.4086700Z"}
{"LogLevel":"dbug","Category":"Microsoft.AspNetCore.Components.Infrastructure.PersistentStateValueProvider","Message":"No value to restore for storage key 'GY+utGHxVFNiiAOlJajMCoTIQigGKM0Y4/Dx8UZ1sOI=' of type 'IEnumerable`1' for property 'Selected'","TraceID":"46cbe39c693730989df570eddfdf2dfe","SpanID":"3a72572fe3eefc38","Timestamp":"2025-09-12T03:58:41.4424741Z"}

[javiercn]

I tried that, and it also works if you immediately visit the page again. If you wait just a minute or two until the connection would normally have timed out, the resume fails. I assume the problem is that the state server side is not properly marked as ready for resume, and thus fails to resume.

I'm confused, are you talking about the freeze event? (note that is an experimental chrome API). The immediately visit the page again is unclear to me. Reloading the page or navigating away and coming back is not a supported scenario.

[davhdavh]

I mean if you capture the async and await in resume, then if you freeze and then resume BEFORE the connection timeout it will work.
Ie, standard testing scenario where you force freeze the page and then click the page to resume it will work.
That's just not a realistic scenario, since the real freeze happens when the browser determines that it will be a long time before user intend to interact with the page again.