CTD while streaming, crashes obs and audio apps

I just got this CTD right at 500ft on a approach. With no scenery installed that was anywhere near my destination airport. I actually got the same later after loading into another default airport.

The weird thing is, it happened while streaming and the crash crashed my whole OBS, causing it to shut down my stream and bugging out all audio devices. A pc restart was needed to fix the problem. Today was the first day I experienced it and it never happened before

System:
Steam
AMD R7 5800X
RTX 2070 Super
32GB RAM
MSFS 1.18.15.0
driver 471.11

FPS are capped to 40fps via Nvidia Control panel.
VCredists are freshly new.
Live traffic is off.

No before we start the whole “disable all addons” search, which I actually dont have time to test, my question is, wether someone experienced the same issue. Especially with the whole obs/audio apps crash which is new to me.

Cheers in advance