I have the same issue on Ubuntu 22.04 and 22.10 using wayland or switching back to X11.
There’s a related thread here to do with a conflict with evolution:
The same issue persists with Xojo 2022r4.1
I suspect it might be related to Fedora adopting GTK 4.
I noticed this package webkitgtk3 is not available but this one is webkitgtk4 but not for 32-bit.
I second the emotion to make Xojo available as a Flatpak
Same issue in Ubuntu 22.10 Cinnamon Remix installed from .deb package which rules out that this is because of GTK 4
Strangely however the issue does not occur in Debian sid (unstable) with Cinnamon DE and latest Xojo installed from .deb package
Do not use Debian sid as your daily Driver, I used it here just for testing.
I guess I will have to use Mint in the meantime based on Ubuntu 22.04 LTS while Xojo resolves this.