Yeap, it's a clever (but crappy) implementation of live RDS data changes. My Sierra and my Q7 both did the same thing.That's probably just what the RDS system is broadcasting. This is just like when a new song comes on.
That is easy. Turn off audio. No audio track info. I mostly do this now. I think it is an aging effect.Then don't listen to FM? You're really blaming this on Rivian? Sounds like you don't want any audio track info on that screen, which fine, but that's a different ask.