Hi. So I was having the EXACT same issue. All of a sudden I stopped getting notifications for my mom's texts. FYI - I have a Samsung Note20 Ultra. I figured this out on my own after I was told by support from the members app that the only way to fix it was to factory reset...which I was unwilling to do.
Here is what solved it for me:
I figured out that SOMEHOW my mom was added to a notification category that had been blocked:
Well.. after MANY hours of searching and trouble shooting I FINALLY found THIS:
So I went into messages, clicked into my mom's chat conversation, then clicked on the 3 dots by her name:
then clicked on notification sound:
then RESET and reset:
Once I reset the notification sound, notifications started working again!!
Also... just FYI, I changed her chat sound back to the custom sound I had for her previously and the notifications are STILL working.
Who knows why this worked or why it blocked that category I have been using the same custom sound for her for YEARS... but
Hopefully this fix works for you too!!
Thanks for reaching out for assistance.
It definitely can be frustrating not being able to receive text notifications from a specific contact.
Let's make sure the notifications are "enabled" for that conversation in the Messages app.
Navigate to the messages app > find the conversation > long press on the conversation > tap on the menu option > tap on notification option > toggle on show notifications.
I hope this helps!
Feel free to reach back out to us if you still need any assistance.
Took phone to Samsung Service center and to T-Mobile service and neither could fix/resolve the issue. Had app setting reset too, deleted contact and history, etc. Service has spent many hours, however I feel it was the last pushed update that caused this issue. I have an S20, and hope they can find a solution soon.