Roberto Ragusa composed on 2022-09-04 17:46 (UTC+0200):
Similar problem here for many years through many Fedora versions, plasma-desktop on Intel integrated graphics
...
It may be something related to buffer/pixmaps/something allocations, there was a suspicion that having a chat program with a constantly blinking icon would show up the problem faster.
No idea how I can investigate or report this.
I haven't yet looked myself, but I've seen reports in various places that one answer should be found in QT's or libyui's bug tracker. see e.g.: https://github.com/libyui/libyui/pull/81