This has been present since macOS 12 and iOS 15 and it's driving me insane that Apple isn't fixing it. It's present on my iPad, 2 iPhones, MacBook Air M1, and my Mac Studio.
Basically, sometimes when I send a message it will convert the recipient's name with their phone number or when I receive a message, it will list the recipient's phone number instead of their name despite this information being in Contacts. I feel like Messages is not properly comparing data with Contacts to display a person's name instead of their phone number.
If I quit Messages and restart it, the person's name will appear instead of their phone number.
Basically, sometimes when I send a message it will convert the recipient's name with their phone number or when I receive a message, it will list the recipient's phone number instead of their name despite this information being in Contacts. I feel like Messages is not properly comparing data with Contacts to display a person's name instead of their phone number.
If I quit Messages and restart it, the person's name will appear instead of their phone number.