It is interesting what's wrong with CopyContext.
It returns early here https://gitlab.winehq.org/wine/wine/-/blob/a34a403723661a3bf9c958c2431d58cce... and causes coreclr to failfast.
Is there any app which reproduces the issue?
I'd assume all x86 .NET 6.0 apps that use threading in anyway. I wasn't able to get a very minimal repro so I just copied over code that was causing issues for me here: https://github.com/js6pak/CoreclrWineCrash