CodeLens stops showing references after a short time.

[suadev]

Environment data

.NET SDK:
Version: 9.0.305
Commit: 3fc74f3529
Workload version: 9.0.300-manifests.75243b89
MSBuild version: 17.14.21+8929ca9e3

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26100
OS Platform: Windows
RID: win-x64

VS Code version: 1.104.2 (user setup)
C# Extension version: 2.90.60

C# logs

C# output window contents:

2025-10-02 09:34:38.904 [info] Installing C# dependencies...
2025-10-02 09:34:38.904 [info]

2025-10-02 09:34:38.904 [info] Platform: win32, x86_64

2025-10-02 09:34:38.904 [info]

2025-10-02 09:34:38.904 [info] Downloading package 'Language server for Roslyn Copilot integration'
2025-10-02 09:34:41.210 [info] (35 KB)
2025-10-02 09:34:41.210 [info] ..........
2025-10-02 09:34:41.377 [info] .........
2025-10-02 09:34:41.378 [info] .
2025-10-02 09:34:41.378 [info] Done!

2025-10-02 09:34:41.379 [info] Validating download...

2025-10-02 09:34:41.379 [info] Integrity Check succeeded.

2025-10-02 09:34:41.380 [info] Installing package 'Language server for Roslyn Copilot integration'

2025-10-02 09:34:41.380 [info]

2025-10-02 09:34:41.396 [info] Finished

2025-10-02 09:34:41.396 [info]

2025-10-02 09:34:42.491 [info] Locating .NET runtime version 9.0.1
2025-10-02 09:34:42.794 [info] Dotnet path: C:\Program Files\dotnet\dotnet.exe
2025-10-02 09:34:42.794 [info] Activating C# + C# Dev Kit...
2025-10-02 09:34:44.697 [info] [stdout] info: Program[0]
Server started with process ID 110516

2025-10-02 09:34:49.247 [info] [stdout] {"pipeName":"\\.\pipe\a0fe85e1"}

2025-10-02 09:34:49.248 [info] received named pipe information from server
2025-10-02 09:34:49.249 [info] client has connected to server
2025-10-02 09:34:49.540 [info] [Program] Language server initialized
2025-10-02 09:34:51.225 [info] [textDocument/diagnostic] [Microsoft.CodeAnalysis.LanguageServer.DotnetCliHelper] Using dotnet executable configured on the PATH
2025-10-02 09:34:52.152 [info] [textDocument/diagnostic] [Microsoft.CodeAnalysis.LanguageServer.FileBasedPrograms.FileBasedProgramsProjectSystem] Failed to obtain virtual project for '\src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\Services\SnapshotService.cs' using dotnet run-api. Falling back to directly creating the virtual project.
2025-10-02 09:34:52.246 [info] [textDocument/diagnostic] [Microsoft.CodeAnalysis.LanguageServer.FileBasedPrograms.FileBasedProgramsProjectSystem] Failed to obtain virtual project for '\src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\Services\ChangeStreamHostedService.cs' using dotnet run-api. Falling back to directly creating the virtual project.
2025-10-02 09:34:53.108 [info] [textDocument/diagnostic] [Microsoft.CodeAnalysis.MSBuild.BuildHostProcessManager] .NET BuildHost started from c:\Users.vscode\extensions\ms-dotnettools.csharp-2.90.60-win32-x64.roslyn\Microsoft.CodeAnalysis.LanguageServer.exe reloading to start from C:\Program Files\dotnet\dotnet.exe to match necessary SDK location.
2025-10-02 09:34:55.175 [warning] [textDocument/diagnostic] [LanguageServerProjectLoader] Project \src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\Services\SnapshotService.csproj has unresolved dependencies
2025-10-02 09:34:55.199 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Projects\VGen\VGen.VSupplier.Services.ReadModel.Listener\src\VGen.VSupplier.Services.ReadModel.Listener\VGen.VSupplier.Services.ReadModel.Listener.csproj loaded by C# Dev Kit
2025-10-02 09:34:55.209 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Successfully completed load of \src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\Services\SnapshotService.cs
2025-10-02 09:34:55.217 [warning] [textDocument/diagnostic] [LanguageServerProjectLoader] Project \src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\Services\ChangeStreamHostedService.csproj has unresolved dependencies
2025-10-02 09:34:55.218 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Projects\VGen\VGen.VSupplier.Services.ReadModel.Listener\src\VGen.VSupplier.Services.ReadModel.Listener.Core\VGen.VSupplier.Services.ReadModel.Listener.Core.csproj loaded by C# Dev Kit
2025-10-02 09:34:55.220 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Successfully completed load of \src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\Services\ChangeStreamHostedService.cs
2025-10-02 09:34:55.223 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Projects\VGen\VGen.VSupplier.Services.ReadModel.Listener\src\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure\VGen.VSupplier.Services.ReadModel.Listener.Infrastructure.csproj loaded by C# Dev Kit
2025-10-02 09:34:55.225 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Projects\VGen\VGen.VSupplier.Services.ReadModel.Listener\src\VGen.VSupplier.Services.ReadModel.Listener.Resource\VGen.VSupplier.Services.ReadModel.Listener.Resource.csproj loaded by C# Dev Kit
2025-10-02 09:34:55.227 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Projects\VGen\VGen.VSupplier.Services.ReadModel.Listener\src\VGen.VSupplier.Services.ReadModel.Listener.Application\VGen.VSupplier.Services.ReadModel.Listener.Application.csproj loaded by C# Dev Kit
2025-10-02 09:34:56.561 [error] [workspace/_roslyn_restore] [Microsoft.CodeAnalysis.LanguageServer.Handler.RestoreHandler] Restore completed with errors.
2025-10-02 09:34:56.568 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:05.4469749

Error Detail

After a short period of time, CodeLens stops showing references. Error Log:

[workspace/_roslyn_restore] [Microsoft.CodeAnalysis.LanguageServer.Handler.RestoreHandler] Restore completed with errors

Expected behavior

CodeLens shows references

Actual behavior

CodeLens not showing references after a short time.

[suadev]

Additional recurring error logs that apperared later.

2025-10-02 15:13:29.837 [error] [codeLens/resolve] [LSP] StreamJsonRpc.LocalRpcException: Resolve version '2025-10-02T12:13:22.7887697Z-10006-0' does not match current version '2025-10-02T12:13:29.5404256Z-10098-0'
at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeLens.CodeLensResolveHandler.ResolveCodeLensAsync(CodeLens request, Document document, CancellationToken cancellationToken) in //src/LanguageServer/Protocol/Handler/CodeLens/CodeLensResolveHandler.cs:line 61
at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`1.StartRequestAsync[TRequest,TResponse](TRequest request, TRequestContext context, IMethodHandler handler, String language, CancellationToken cancellationToken) in //src/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 191

2025-10-02 15:13:31.925 [error] [codeLens/resolve] [LSP] StreamJsonRpc.LocalRpcException: Resolve version '2025-10-02T12:13:29.5404256Z-10098-0' does not match current version '2025-10-02T12:13:31.1699585Z-10178-0'
at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeLens.CodeLensResolveHandler.ResolveCodeLensAsync(CodeLens request, Document document, CancellationToken cancellationToken) in //src/LanguageServer/Protocol/Handler/CodeLens/CodeLensResolveHandler.cs:line 61
at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`1.StartRequestAsync[TRequest,TResponse](TRequest request, TRequestContext context, IMethodHandler handler, String language, CancellationToken cancellationToken) in //src/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 191

....

[JoeRobich]

After a short period of time, CodeLens stops showing references.

Do other language services continue to work? Such as quick info and completions?

[workspace/_roslyn_restore] [Microsoft.CodeAnalysis.LanguageServer.Handler.RestoreHandler] Restore completed with errors

I don't think this would be related, but I am interested in getting more detailed logs to be certain. Could you follow these instructions to set the log level to trace and collect new logs?

[error] [codeLens/resolve] [LSP] StreamJsonRpc.LocalRpcException: Resolve version '2025-10-02T12:13:29.5404256Z-10098-0' does not match current version '2025-10-02T12:13:31.1699585Z-10178-0'

There are not necessarily a problem. It is quite natural during editing that the document changes before the code lens could be resolved. We should consider updating how this message is surfaced.

[suadev]

Yes other features are working. I just realized i am facing this issue with only one repository. So it is definetly about with the configuration of this repo. But i dont have any idea where do i have to check out. Do you have any suggestion?