All audio tracks go silent when tuning a vocal in variaudio

Can someone please tell me how to troubleshoot this. I was tuning a vocal and not before long the audio track goes silent and all other audio tracks in my project go silent too. I am using Cubase 12 on a brand new macbook pro in Silicon mode. I just upgraded from Cubase 10.5. After this happens if I try and go out of Cubase to try reaopen the project it stalls my computer and freezes the program and I have to force quit Cubase.