Reported as https://bugs.kde.org/show_bug.cgi?id=462140, which turned out to be a duplicate of this bug https://bugs.kde.org/show_bug.cgi?id=447475.

Apparently, a related issue with the graphics driver has been fixed upstream. However, as of 4th Dec 2022, KDE Neon does not include this fix.

EDIT: Changed previous message to clarify that this bug was a duplicate.