Hi, I'm using AirPods Pro too all day long developing or during skype calls. I've notice that when I put my music back on after a call I get it with kind of lo-fi effect.
To get the high quality back I go to Settings > Sound > Input, I switch to the MacBook Pro internal speakers and back to AirPods.
I think it's related to the new AirPods auto-switch feature. It will be fixed soon I suppose.