You might want to try restarting your device, as this can actually fix minor glitches. If that doesn't work, make sure iCloud Contacts syncing is turned on by going to Settings > [your name] > iCloud and turning on Contacts. But also make sure that all relevant accounts have Contacts syncing turned on in Settings > Contacts > Accounts. If the issue persists, try signing out of your iCloud account and signing back in to refresh the connection. In some cases, editing the contact and restarting your device can prompt the contacts to restore properly.