Tihiy

They promised to make it work but can't promise any timeline

That's pre-release for Microsoft, actually. I need them to remove update block as I'm unable to work it around without a jigsaw.

Well this is a problem with native taskbar as well with the apps which change paths but do not have persistent UUID (e.g. Electron s***).

Well that's strange, as SAB doesn't interfere with that

That's not my question. Does it fails to switch or it switches but doesn't display current language?

Fails to switch or fails to display proper language in the tray? Does it happen for IME only?

Yes, but that may defeat the purpose of the app. The purpose of the app is to provide lightweight legacy UI with better user experience; leaving new UI hanging there may compromise that. So far we've agreed with MS to disable classic taskbar on 24H2 by default for now.

Ask Rafael about that I guess

Yeah maybe. Check settings - Tray Icons - On secondary displays

It's on by default

It would be nice to triage the culprit. Any stardock apps or other customization software?

Well you can rename setup to NotStartAllBackSetup..exe. No idea why a crude hardblock like that.

Yes, because it's fixed in 3.7.8

What theme is that?

Thanks. If you've updated to 3.7.8, please redownload.