Randomly contacts added to blocked list
I'm using iPhone13 in my contacts I have around 620 contacts but after 1-2 days automatically 2 contacts vanished to the blocked list now it has 618 contacts then I added 1 of those 2 blocked contacts back to my contacts but it vanished again with 1 new random contact, now blocked list has 3 contacts.
In my settings->contacts only icloud has access to contacts I have even removed by Gaccount, but the problem remains. I have updated my iPhone to the latest version already, I have never heard this kind of issue before, let me know if there's any fix.