Blazor InputRadio is broken by IHandleEvent

[plastovicka]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

If a Blazor page implements IHandleEvent to optimize rendering speed according to performance best practices, then all input radios are broken. After a radio button is clicked, it is instantly rendered back to its previous state. Then it looks like the value was not changed. The problem started after upgrade to .Net 8.

Expected Behavior

It worked in .Net 7.

Steps To Reproduce

@page "/"
@implements IHandleEvent

<InputRadioGroup @bind-Value="n">
  <InputRadio Value="0" />
  <InputRadio Value="1" />
</InputRadioGroup>

@code {
  int n;

  Task IHandleEvent.HandleEventAsync(EventCallbackWorkItem callback, object? arg) => callback.InvokeAsync(arg);
}

Exceptions (if any)

No response

.NET Version

8.0.100

Anything else?

No response

[javiercn]

I've tracked down the source of the issue to 4e0c598 in InputRadio.cs

[javiercn]

#53245