Checking the Apple ID on the linked devices
Open up the Settings app on your iPhone and navigate to iCloud to check the currently logged in user. If the same user is logged into another iPhone, you’ve found the cause for the mysterious issue.
There is no need to completely log out of one of the accounts to fix the problem above. We can simply toggle the iCloud Drive functionality to fix the call list issue.
Family sharing is useful for keeping music, movies, apps and photographs in sync with your family and not having to purchase content multiple times. If you use Family Sharing instead of logging into multiple iPhones with your Apple ID, you shouldn’t be experiencing the above issues and everything should work fine.