It's the easiest to restore data from backup files if you had one.So far it doesn't look good.
I backed up my system
Cleared data/factory reset
booted up phone and logged in.
Checked phone settings of a particular contact and confirmed it lost the default number settings
Restored in Tibu the Phone app and data...no change
Restored contact data....no change
Restored contact storage data...no change.
I just can't figure out where that particular setting comes from to back it up.