Duplicate contacts on iPhone even after merging on Mac
Every contact on my iPhone is duplicating, some up to 30 times. I’ve merged them on the contacts app on my Mac ensuring 'all contacts' was selected, and removed all duplicates but it’s made no difference on my iPhone or indeed iCloud (which I've checked by logging in through the browser on my Mac). I’ve been into contacts on the phone and swiped down to refresh multiple times. Any help is appreciated. It happens to new contacts within hours.
ipuone 11
iOS 15.1