Notifications from iMessage don't show the contact name, even though conversation list properly does

macOS 11.2.3 // MacBook Air M1 2020

Desktop notifications from iMessage don't show the name of who is messaging me; it only displays the phone number. In some cases the notification will say Maybe: Contact Name.

I'm not sure why this is happening. I did not have this problem on my MacBook Air Intel 2020.

When I go to the conversation picker in iMessage, all of my conversations are there with name and contact photo.

I've disabled and re-enabled contact syncing for iCloud and my other accounts (MS, Goog) from both Contacts.app and System Preferences > Internet Accounts. I've even gone through and updated individual contacts so that their phone was listed as 'iPhone' and not 'mobile'.

I know another person who is having the same issue. I feel I've checked every setting, de-duped my contact list, done everything I could, but it's still not fixed.

I think my next step is to wipe my MacBook and set it up as a new device. I used the Transfer Assistant and am wondering if that caused the issue.