yeah. this is probably due to rcs. google needs to find a way to get rcs working without disabling battery optimization. no other messaging app asks for that. and if they did, google would have been calling them bad programmers.
at my end, my number seems to be some kind of a blocklist now after i reinstalled messages way too many times to get the categorization working. now, categories are still not working and i cannot get activated on rcs lol.