This happen to me too on PS4 without any mod or update, I didn't find any solution other than start a new game from zero.
Did you start your game from a save you kept in a cloud or a USB?, or Did you Uninstall & Reinstall the game keeping the saves on the console?. Skyrim is an old game with a new paint job, is temperamental as Fffffff!... So always starting a new game, is the most certain way to avoid game breaking bugs.