Max Katz

@NullFragment not related. Check breaking changes page https://github.com/AvaloniaUI/Avalonia/wiki/Breaking-Changes Note that 11.0 is in development and nightly builds might not be stable.

I don't think ReactiveUI is compatible with iOS of current SDK. It definitely wasn't couple of months ago.

In this case PackageReference should be removed as well. It's just unused now.

Build should work with latest reactiveui (18.0.7+) https://github.com/reactiveui/ReactiveUI/issues/3184

Btw, this call was added only to Desktop call. But not to other projects. I.e. it should be something like this in AppDelegate for iOS: ``` protected override AppBuilder CustomizeAppBuilder(AppBuilder...

@bcssov hi, thanks for your findings! Do you want to open a PR with this change?

Though I am a bit confused with this issue and another similar https://github.com/AvaloniaUI/AvaloniaVS/pull/196

Also https://github.com/AvaloniaUI/AvaloniaVS can be updated as well (can't duplicate issue while transferring)

Can you check output logs? There might be useful information. 

It's not only a tab control issue. It happens with any kind of content there.