WasmEnableThreads and TextBox (WASM)

[flucas1]

Describe the bug

When using WasmEnableThreads and using clipboard keyboard shortcuts, a letter is inserted in the TextBox.
If pressing CTRL+C, a c is inserted, and the text is copied to the clipboard,
If pressing CTRL+V a v is inserted in the textbox, in addition to the clipboard text.
Without WasmEnableThreads the behavior is as expected

To Reproduce

Net 9.0.2 and avalonia 11.2.3, 11.2.4 (not tested with older versions)

Expected behavior

No response

Avalonia version

11.2.4

OS

WebAssembly

Additional context

No response

[kekekeks]

Is that with Firefox? This hack doesn't work in MT mode since input events are forcefully sent to a background thread by the runtime.

[flucas1]

I have tried on Windows, with LibreWolf, Chrome and Edge.
The behaviour is like described, CTRL+x / CTRL+v does the action and inserts extra key

And on Linux with Firefox, is the same as in windows

Linux and Chromium, CTRL+v, inserts the V, but does not paste any text, (and CTRL+c cuts the text instead of copy)

I can provide public access to the website, but it will take a few weeks, until it is ready for this.

[maxkatz6]

I am almost certain it's caused by keydown events not being handled by MT backend, since JS handlers are sync, and MT code requires C# handlers to be async.