PersistentState Attribute not working for last field on iPhone

[brackers17]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When using the [PersistentState] attribute on an iPhone, we are seeing unexpected behaviour when the app is backgrounded and disconnects (after 3 minutes)

Expected Behavior

The app should reconnect and restore state including the last typed value.

Steps To Reproduce

1. Scaffold a new .NET 10 project with Blazor Web App and the following settings:

• .NET 10 Preview
• Auth: none
• Interactive render mode: server
• Interactivity: global
• include sample pages: true

2. On the counter page add the code below

`
@page "/counter"
Counter

<h1>Counter</h1>

<EditForm Model=@CarViewModel>
	<label>Make</label>
	<InputText @bind-Value="CarViewModel.Make" />
	<label>Model</label>
	<InputText @bind-Value="CarViewModel.Model" />

	<input type="submit" value="Submit" class="btn btn-primary" />
</EditForm>

@code {
	[PersistentState]
	public CarViewModel CarViewModel { get; set; }

	protected override async Task OnInitializedAsync()
	{
		if(CarViewModel is null)
		{
			CarViewModel = new CarViewModel();
		}
	}
}

`

3. Add a viewmodel:

public class CarViewModel { public string Make { get; set; } public string Model { get; set; } }

4. Deploy to IIS and go to an iPhone/iPad
5. Type into each field and leave the browser but don't lose focus from the last field.
6. After 3 minutes go back in to Safari. The first field will be populated but the second field will be lost.

If you repeat this for less than the 3 minutes then it manages to keep the last field. Its only when the connection is fully lost that its losing the data (ie when the [PersistentState] attribute is doing the work).

Exceptions (if any)

No response

.NET Version

10.0.100-rc.1.25451.107

Anything else?

VS: 17.14.12 Preview 1.0
.NET SDK:
Version: 10.0.100-rc.1.25451.107
Commit: 2db1f5ee2b
Workload version: 10.0.100-manifests.a6e8bec0
MSBuild version: 17.15.0-preview-25451-107+2db1f5ee2

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26100
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.100-rc.1.25451.107\

.NET workloads installed:
[maui-windows]
Installation Source: VS 18.0.11104.47, VS 17.14.36408.4
Manifest Version: 10.0.0-rc.1.25452.6/10.0.100-rc.1
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100-rc.1\microsoft.net.sdk.maui\10.0.0-rc.1.25452.6\WorkloadManifest.json
Install Type: Msi

[maccatalyst]
Installation Source: VS 18.0.11104.47, VS 17.14.36408.4
Manifest Version: 18.5.10727-net10-rc.1/10.0.100-rc.1
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100-rc.1\microsoft.net.sdk.maccatalyst\18.5.10727-net10-rc.1\WorkloadManifest.json
Install Type: Msi

[ios]
Installation Source: VS 18.0.11104.47, VS 17.14.36408.4
Manifest Version: 18.5.10727-net10-rc.1/10.0.100-rc.1
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100-rc.1\microsoft.net.sdk.ios\18.5.10727-net10-rc.1\WorkloadManifest.json
Install Type: Msi

[android]
Installation Source: VS 18.0.11104.47, VS 17.14.36408.4
Manifest Version: 36.0.0-rc.1.285/10.0.100-rc.1
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100-rc.1\microsoft.net.sdk.android\36.0.0-rc.1.285\WorkloadManifest.json
Install Type: Msi

Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 10.0.0-rc.1.25451.107
Architecture: x64
Commit: 2db1f5ee2b

.NET SDKs installed:
3.1.426 [C:\Program Files\dotnet\sdk]
6.0.428 [C:\Program Files\dotnet\sdk]
9.0.304 [C:\Program Files\dotnet\sdk]
10.0.100-preview.7.25380.108 [C:\Program Files\dotnet\sdk]
10.0.100-rc.1.25451.107 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0-preview.7.25380.108 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0-rc.1.25451.107 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0-preview.7.25380.108 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0-rc.1.25451.107 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.19 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0-preview.7.25380.108 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0-rc.1.25451.107 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

[javiercn]

@brackers17 thanks for contacting us.

PersistentState only saves data that has reached .NET. If you don't move away from the field, the onchange event doesn't trigger and the value never reaches .NET. You can use oninput to make sure to capture the value updates as they occur.

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