[WASM][Threading] JS Exception when using websockets.

[aquino-a]

I recently upgraded a project to the latest UNO and .NET 7 in order to use threading in the WebAssembly implementation.
The project works fine with threading disabled.

Websocket Issue Description:

• Logic is executed from a System.Threading.Timer.
• Is able to connect. ('Open' State)
• Javascript error when sending on the socket:
  'TypeError: Failed to execute 'decode' on 'TextDecoder': The provided ArrayBufferView value must not be shared.'
• If sent on the UIDispatcher, it doesn't have an error.
  In that case, the websocket is Closed Abnormally (1006) when receiving.

Is this an underlying issue or is websocket functionality all supposed to be run from the UI thread?

After looking further it looks like an issue on the dotnet side: dotnet/runtime#74413

[jeromelaban]

This is indeed a .NET runtime issue. It will be fixed once fixed over there, then integrated into the Uno.Wasm.Bootstrap package.