Thanks for the hint.
I deactivated it (as i dont use it at all as far as i know). But in fact that didnt help much either
But i think i might have found a sollution - but still need further investigation / testing.
I set the off-screen terrain pre-chaching from former mid/high setting to ultra and the microstutters and also sound problems seem to disappear.
Loaded two times into the sim now without problems. Guess tomorrow or latest sunday i’ll try a full flight. pressing thumbs