Hi Oxocon,
I am on a Mac, a Mac Studio Ultra m1, a Macbook m1 and an Intel iMac late 2015. Working at two different internet connections and providers, for home and an office in the city.
I had simular issues before when Chaos just started the new license system. They helped me sort it out and the current versions of CR 9 and C4D 2023 are good. Actually, it's all very stable and reliable. No Crashes or anything really apart from a few minor things that have to do with the UI.