Not sure if this has been addressed lately. I did a search and only found some threads that were pre-1.3.

Maybe I did something wrong in my game, but my Dead Thrall disappeared on me. Uthgerd the Unbroken was my thrall, but after clearing out a dungeon (Broken Ore Grotto), she disappeared after leaving. Is this even a bug or did I screw something up? I didn't post this in the bugs "issues" forum because I wasn't sure if this was even a problem or my own mistake.