I'm using latest Ableton, Kontakt8 with KOMPLETE COLLECTORS EDITION - on a M4 Pro Mac mini. it's connected over USB C to a thunderbolt 5 port on a TB5 hub connected to my mac.
I get flickering.
Your screen on your MK3 flickers, or the text, or is it your PC. Can you explain in more detail or better, take a small video of the issue maybe?