The test should not be quarantined, it's under observation. It has a PR that tries to fix it and requires more investigation: https://github.com/dotnet/aspnetcore/pull/62662.

## Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1090989
Build error leg or test failing: Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.RedirectionTest.NavigationException_InAsyncContext_DoesNotBecomeUnobservedTaskException
Pull request: https://github.com/dotnet/aspnetcore/pull/62602

## Error Message

Fill the error message using [step by step known issues guidance](https://github.com/dotnet/arcade/blob/main/Documentation/Projects/Build%20Analysis/KnownIssueJsonStepByStep.md).

```json
{
"ErrorMessage": "A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

```

Hello, world!

4

Unobserved Exceptions (for debugging):

• System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Cannot access a disposed object.
  Object name: 'IServiceProvider'.)
  ---> System.ObjectDisposedException: Cannot access a disposed object.
  Object name: 'IServiceProvider'.
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.ThrowHelper.ThrowObjectDisposedException()
  at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
  at Microsoft.AspNetCore.Components.Server.Circuits.CircuitPersistenceManager.PauseCircuitAsync(CircuitHost circuit, Boolean saveStateToClient, CancellationToken cancellation) in /home/vsts/work/1/s/src/Components/Server/src/Circuits/CircuitPersistenceManager.cs:line 25
  at Microsoft.AspNetCore.Components.Server.Circuits.CircuitRegistry.PauseAndDisposeCircuitHost(CircuitHost circuitHost, Boolean saveStateToClient) in /home/vsts/work/1/s/src/Components/Server/src/Circuits/CircuitRegistry.cs:line 312
  --- End of inner exception stack trace ---
• 
  ```

  ### Known issue validation
  **Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1090989
  **Error message validated:** `[A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.`]
  **Result validation:** :white_check_mark: Known issue matched with the provided build.
  **Validation performed at:** 7/11/2025 10:21:55 AM UTC

  ### Report
  #### Summary
  |24-Hour Hit Count|7-Day Hit Count|1-Month Count|
  |---|---|---|
  |0|0|0|
  

Start with the failing Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.RedirectionTest.NavigationException_InAsyncContext_DoesNotBecomeUnobservedTaskException test and review PRs 62662 and 62602. Trace the reported ObjectDisposedException through CircuitPersistenceManager.cs and CircuitRegistry.cs, then verify the build no longer reports the unobserved exception.

Written by the indexing model from the issue text.