My phone recently updated to Android 12 which appears to have introduced a strange bug. I have multiple group texts with family and friends. On some of the text messages some people's phone numbers are being corrupted by adding +52 and making them 'untextable'. In my address book the number shows ok but when I try to text them it adds the '+52' and the text is rejected. The only way I've been able to fix this is by deleting the threads I've had for years (dumb fix). Not sure if this is an Android or iPhone issue.