dotnet / dotnet/aspnetcore

Encountered unsupported frame type during diffing: None

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area-blazor
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Description

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

We have a Blazor server rendered app that we gather error info from. This error from Blazor framework shows up:

```
System.NotImplementedException: Encountered unsupported frame type during diffing: None
at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
at Microsoft.AspNetCore.Components.RenderTree...
```

This error occured about 50 times in the last 7 days. I don't have anymore information.

There are some other issues that include this error message: https://github.com/search?q=repo%3Adotnet%2Faspnetcore+Encountered+unsupported+frame+type+during+diffing%3A+None&type=issues

### Expected Behavior

Blazor framework doesn't throw internal errors.

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### .NET Version

_No response_

### Anything else?

_No response_

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