Thank you so much for your explanation. It took me hours upon hours to get here and understand that it is no bug in my code that causes my actor to always execute on the main thread. Saved my day and sanity :)

Thank you for your quick reply. This solves my wuestion.

This comment saved me with the same issue in Xcode 15 beta 7! Thank you so much!

Thank you for your fast response 🙂. Feel free to contact me for more information about the issue, should you need it.

I am seeing the exact same error. I have added the Swift Package in question to my app's project file to the app target in Frameworks, Libraries, and Embedded Content. However, this does not resolve the issue. Can someone please point out if I have to take additional steps to follow the workaround pointed out above?

This issue continues to exist with Xcode 15.0 Beta 3. In beta 2 the error occurred immediately after running the app. In beta 3 the app becomes unresponsive when becoming active and it takes about a minute before the error occurs.