I do not know what happened, my app crashed 2 times for the first time after upgrade to 5.13. I never saw this, the active thread sends empty frames using crashpad, but in logs I could see that after creating my widget classes the app crashed during init.
the only clue I have is this. I can not provide a reproducible example.

Critical: "AddClipboardFormatListener() failed". (Access is denied.)

Can you at least give me a hint when this could happen and how to prevent it?