About 2 weeks ago, I suddenly stopped receiving text from just ONE iPhone user. We have been texting just fine for years until now. They have rebooted, deleted my contact, reset setting, hard reset, and almost everything. I have reset and made sure they werent blocked. This iPhone user also receives my texts just fine. We are both very frustrated and confused. Currently using a texting app to text for now. Any suggestions or tips? Could it be an iOS issue?