the-elder-scrolls-v-skyrim
I just finished a quest in Broken Oar Grotto. I have a normal Follower and a NPC (Chief Yamarz) I revived with Raise Thrall.
I am leaving the cave and my Follower comes out just fine, but my dead NPC will not leave the cave. He will follow me around like normal in the cave, but not transverse areas. Nor does Fast Traveling fix this.
Why? How can this be fixed?
Have you tried verifying the game's integrity? It sounds like something might have gotten corrupted, and rather than crashing, the launcher is recovering (though not giving you an error message to let you know something's wrong).
Its a known glitch that he may become stuck. If you are on the PC, then you can use the console to free him:
A workaround for this problem is to use the console and type: 'setstage 76b4a 200' This will complete the quest. Then type 'player.placeatme 0001403E' while in Darkwater Crossing, which will spawn Derkeethus. This will leave the original (and bugged) Derkeethus still in the cave, and it is recommended to leave this NPC alone to avoid further glitches.
Otherwise, you are out of luck.
Best Answer
According to the text at the bottom of this UESPWiki page, it's a bug.
If you have the PC version you can work around it via the console.
Reanimated or Thralls may get stuck in some cells (locations) and may not go outside with the player. To fix that go back inside and find your thrall, open the Console and target your thrall (you should see a number RefID), do not click on anything else and close the console, go outside and open the console again to issue a command moveto player, close console. Your thrall should stand next to you.