Recently I unblocked someone from sending me text messages and ever since then if they send me a text it may go through immediately or it may take anywhere up to an hour to receive. I have this problem with no other person and nor does the sender. If they try to call after a text shows as sent, but not delivered, there's a delay, but then it rings twice and goes to voicemail. I never receive the call on my end. This has been going on for about a week we've both cleared our cache, settings, and restarted both phones. We each have a pixel.
Any advice short of resetting the phone to factory default? And if that's the only option, which one should do the resetting?