I've had similar findings. Thank you for posting your results! I went through too many distros / attempts before realizing that I should have been recording findings... Alas...
The latest project that I've had success with involves exclusive use of snaps:
Ubuntu Server (Minimal) 22.04
ubuntu-frame (snap)
ubuntu-frame-osk (snap)
firefox (snap, running as systemd service, not snap daemon)
Additional information in this post:
I'd love it if others could try their configurations out and see if issues are solved for them as well, and especially help with my goal to try Perspective Workstation on ubuntu-frame & ubuntu-frame-osk.