I have noticed this everywhere in the game; overland, dungeons, delves, trials, etc., where enemies are just completely inmortal and can't be attacked except by pet, or a few specific skills like daedric tombs.
What triggers this I have no clue, but it affects every enemy type and location in game, and not even roll dodging, relogging, etc. fixes this bug.
Edited by Djennku on 5 June 2025 17:16 @Djennku, PCNA.
Grand Master crafter, all styles and all furnishing plans known pre U41.
Vamp and WW bites available for players.
Shoot me an in-game mail if you need anything, happy to help!