Texts from one person appear to come from the wrong number
My partner and I both have iPhones, both up to date. When she texts me, the number displayed shows as a third party who is not associated with either of us (it's a neighbor who I once had the number of but have since deleted). This does not happen with anyone else - her texts appear correctly when sent to everyone else. Sometimes her texts appear as "Her name & third-party-number"
We have tried: signing in and out of iCloud. Resetting and restoring my phone. Swapping out the SIM at AT&T. Checking that her contact is correct in my Contacts (it is, the extra number is not present).
This is stumping everyone, including Apple and AT&T. Does anyone have experience of this, or can suggest a solution?