Why don't you just rollback to the working version?
if You have flatpack version it looks like this:

# I am using opera-gx, but the process should be the same for or com.opera.Opera
flatpak remote-info --log flathub com.opera.opera-gx # checking version history
sudo flatpak update --commit=80c19d26639c4fda2f4bb93a2a16a9a87d428e15bd387cad7d16034f4b8b5095 com.opera.opera-gx # commit differs for non-gx version, just pick parent of stable version it should be enough # pull request #40 for gx pull request #270 for non-gx
sudo flatpak mask com.opera.opera-gx # blocking auto-update 
...
# after some time I recommand turning back auto-updates. Opera should resolve the problem in some upcoming commit
sudo flatpak mask --remove com.opera.opera-gx