I've noticed something new: videos play, then suddenly stop. When I try to restart them, NewPipe says there's an error. This happens a lot and it started 2 or 3 days after the latest version defeated Google's latest shenanigans. I can see it on my Android TV box and on my cellphone, and it happens with NewPipeX too, but not with Grayjay or Freetube on the desktop.
It certainly feels like Google is deliberately creating random errors for NewPipe users.