Opera stability issues and unable to restore open windows/tabs

[aLe-Ks]

aLe-Ks last edited by

How to debug Opera on Linux?

I've used Opera for a long time and it worked more or less very well, sometimes the open windows freezed and i had to kill Opera and after re-launching it worked again.
Since about a week it's not working that way anymore.
I have 32 Opera windows with several tabs open, but every time i open Opera it starts loading them but than hangs - i can kill Opera again but the problem persists - my Opera Windows don't restore at all anymore.
It started about a week ago with an update (on Debian 11) where Opera was updated as well and issues started that Opera stopped responding and i had to kill and relaunch 10 times a day.
I tried to reinstall the previous version and it worked for two days but then also stopped responding - and now when i kill it and relaunch it never finishes restoring my open windows/tabs.

Where do i start to figure out what the issue is?