I had the same issue, with Google Fi! The only thing that briefly resolved it was swapping my number over to an older phone running stock android. Stopped worki

I had the same issue, with Google Fi! The only thing that briefly resolved it was swapping my number over to an older phone running stock android. Stopped working again when I switched back to my other phone. I just ended up turning it off entirely, but it irreparably broke a few group chats I was in.