Crushes, Freezes and weird audio dropouts with XLN Addictive Drums 2

I’m experiencing very strange behaviour with using XLN Addictive Drums 2. More precisely these issues become even more frequent (more or less every 5 minutes) when I activate all outputs from the VSTi (so I can process like a real miced drum kit).

Windows 10, Cubase 10.5 (but tried it on Cubase 11 trial as well), RME Fireface 802.
Bigger buffer size (1024, 2048…) helps out for a while but not a big difference.

The symptoms are:
GUI freezes, Cubase shuts down unexpectedly, and the weirdest: some channels start reading audio parts from other channels, parts of audio that loop (even from audio that is not in the pool) and some channels produce powerful white noise.

Can’t seem to be able to find any other reports on XLN Addictive Drums 2.