Dual client freeze/crash

Anyone else experiencing client freeze/crash when running multiple clients?

I run two accounts and it keeps freeze/crash the whole PC. I’ve checked stats, no overload on CPU/GPU/Temp.

I’ve cleared game cache files, deleted the Apps folder to create a new one.

Not freezing/crashing (yet?), but I’m experiencing occasional audio-clipping.

I usually get this bug once I hit 20 accounts.