@ITwrx Wayland is the default for Arch, but its still Arch, so IOW, nobody. :wink: The Geany devs and most of the contributors use stable distros.
The only settings that are different on your system make no difference here, so I guess its back to @codebrainz theory that its something weird Wayland does or some change in the bleeding edge version of GTK behaviour. No rush, let us know when you get a chance to try X.