Did you ever find a permanent fix?
I've been having a lot of issues with Streamlabs, Voicemeeter, and PNG Tuber+. PNGT+ keeps crashing or becoming non-responsive every 10-20 minutes despite several reinstalls, changing priority, etc. Tried disabling Voicemeeter, but I get audio driver error messages every 10-20 minutes whether I'm using it or not. It's not my PC or the drivers from what I can tell, and I don't think it's SLOBS or VM either as everything works fine otherwise. I'm only having issues when using PNG Tuber+.