I see problem on mac os x, Opera, Vivaldi, Chrome is affected. To use Polish characters we are using alt+olascxzne. But it seems that alt is captured by JS. It looks the same as for this guy https://help.nextcloud.com/t/not-able-to-input-polish-characters-on-osx-alt-capture/23494 I am using docker version that is marked as latest in docker hub.
*** This bug has been marked as a duplicate of bug 116310 ***