You've tried to help me too a number of times over the past year with the exact same issue with ASI2600MC Pro. Unfortunately still not working here either, always random crashes still - from the debayer error to Kstars just crashing and restarting after a sub is attempted. It's strange that it all appears so random. Same now too on this latest version - upgraded from new image of recently downloaded 1.5.9 -> 1.6.0 w/KStars Stable release 2021-9-30 (rpi4 8gb)
I wish I could get this to work for me. Any hints?