BS B350: PMS50 GTN750 GPS navigation loses way

[Fab10]

BS KingAir B350:
First flights after SU15 release.
In each of my last three flights, using the PMS50 V2.2.30 (latest), the B350 has inexplicably veered off course to no longer follow the GTN750 flight plan.
There's no rhyme or reason to it, it just seems to lose its way despite being on ALT and NAV (GPS).
Thought I'd report this in case others are seeing the same.

[raffzeit]

I have the exact same issue. I'm not sure whether it is caused by the aircraft or the GTN750 software. Additionally I'm having quite a lot of CTDs.