I’m using Fedora KDE 42 and I found that to run Orca well I had to switch to the flatpak of the nightly builds. It still crashes sometimes, but not very often.

Bambu Studio was stable, but I have ditched it for Orca. I also use Prusa Slicer to run my Klipperized Mk3s. Prusa Slicer has always been rock solid for me no matter the distro or OS.