Incoming call is not showing contact name
First of all, this is my first time posting here. Please direct me to the correct channel if I have posted at the wrong place.
I just updated my iPhone6S to iOS11 and I have regretted doing so. Despite having existing contacts with Name, all my incoming calls are showing numbers only.
To reproduce my issue:
1) Created a contact with "Test Name".
2) Making a call from my secondary phone and it is not showing the Contact Name and;
3) My country should NOT be Brazil.
4) When I checked at Recents page, it is NOT showing the name as well.
I have tried to downgrade back to iOS10.3.3 right after I realised the issue but unfortunately, I am not able to restore my 10.3.3 content full backup back. I think I have made a backup on iOS11 after updating, thus it overwrites my iOS10.3.3 backup.
Can someone help me out with this? I have been searching for solution all over the internet but I couldn't find anyone with this issue.
iPhone 6s, iOS 11