Main QtCreator Window turns to mush on loading of .ui file

Steps to reproduce:

1. Start with empty QtCreator (I deleted ~/.config/QtProject folder to make sure no old settings are in the way)
2. Load my Qt/C++/qbs widgets project
3. Open mainwindow.ui file of that project

Expected result:

• Normal widget editor should show up

Actual result:

• Main window of QtCreator becomes a garbled mess of whatever renders above it
• It still seems to process events but rendering is completely broken, for exampel the about dialogue still shows and can be interacted with, keyboard shortcuts to close windows (ctrl + w) works etc.

Please see attached video for how this looks.

EDIT Additional information as requested: I am running KDE 5 on Debian 11 with wayland 1.18.

I have tried to find the "stand alone design tool" but it is nowhere to be found on my system or in the "Maintenance Tool" installer. How can I install it on my system? I tried Qt Design Studio which I think is something else? It was unable to open any .ui files except in XML view.

I will also try switching to X11 and attach my findings from doing so. Please note that I did not actively chose wayland, in fact I thorugh I was running X11 until recently.

Please find attached both the original and a minimal .ui file to reproduce this error. It seems that once I add an QOpenGLWidget instance to the .ui file this triggers the error in question.

$ cat /etc/debian_version
11.9

$ uname -a
Linux debian 5.10.0-26-amd64 #1 SMP Debian 5.10.197-1 (2023-09-29) x86_64 GNU/Linux

$ wayland-scanner --version
wayland-scanner 1.18.0

$ plasmashell --version Warning: fallback to QtQuick software backend.
plasmashell 5.20.5