I get no notification for one contact ios 16

I have a 12 pro max. Current running iOS.. I have restarted the phone multiple times. I have deleted the contact & remade it multiple times. I have turned messages off, restarted phone & then turned messages back on. I have tried everything. I read that it could be bc the contact is pinned. So I unpinned it. With every single one of these “fixes”, notifications will work the first 2-3 texts from this contact (which is my husband), and then it stops again. I have reset my network settings & I do not have do not disturb on or have focus even active on my phone. This is the most frustrating thing. Especially when my husband gets so aggravated that I never get his texts or respond in a timely manner. Also he is not muted. I have been researching this for weeks & did every suggestion I’ve seen. I even reset my whole phone. But once the backup is downloaded back to my phone, it’s all the same.