Created attachment 126185 [details] Offset to click the X button With disabled title bar every mouse input is offset in Firefox. Works fine with kwin 5.17.5 ArchLinux kwin 5.18.1 QT 5.14.1
X11 or Wayland?
X11
> With disabled title bar every mouse input is offset in Firefox. What about other applications, e.g. gedit?
Just installed it, it's the same.
Since 5.18.0 did have the issue in a clean home directory too, I didn't check it again with 5.18.1 at first. The issue was gone with a clean home, and after deleting a few config files and relogging, it was gone my home directory too. Seems that a few config files were misinterpreted.
Hmm, this is a very interesting discovery.