I have the same problem on 72.0.3815.207
As a temporary fix, I have rolled back my Opera version to 71.0.3770.284 (20-Oct-2020).
You can download a previous version from the Opera FTP. Don't forget to turn off auto-update (rename Opera_AutoUpdate.exe in your installation folder).
Let's hope there is an official fix soon, but for now this is a good workaround.
Hope this helps!