And I can go ahead. Meanwhile 18+ hours in the sim, several flights and turnarounds, no CTD anymore. Flying around in Europe, Fenix A320, all the time Vatsim.
Latest Windows 11 - RTX 3090 latest driver - i9 11900K - 48 GB DDR4
SU 9, MSFS Store - All online / live services enabled (no traffic for sure since im on vatsim).
At the moment the problem seems solved. Very happy about that.