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@CodyH Hello, check the applications with Contacts permission. It is possible that some app with contact permissions deletes them.
Access Settings / Applications and in the three points at the top right / Permission manager, look for Contacts and review all apps with this permission granted. Greetings.
How did you get on with this @CodyH ?
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I have no affiliation with Samsung.