In Grizzleheim in Savarstaad Pass, the boss Yngvar Sharptooth no longer spawns in when I enter the dungeon where he normally spawns. The NPC version of the character is there, but not the fightable creature. Before, you could re-fight him as many times as you wanted and he would always respawn, even after you finished his quest. I'm unsure if it was recently changed so that you can only fight him once for the quest and never again afterwards, or if the boss is supposed to be re-fightable like he was before.
I'm trying to collect Animus from Yngvar Sharptooth in Savarstaad Pass, but he is not loading as an enemy. Going inside he only appears as his stationary NPC version with his name in green, and no interactions possible. This must be something relatively new because I've sent many other wizards into this instance to collect Animus and it has worked in the past.