Board Thread:Skyrim/@comment-108.77.5.218-20150916040709/@comment-6881629-20150916095348

Stuff like that that does happen in some places like Thirsk Mead Hall fully quit out of the game and reload or leave the area for over ten in-game days. If it still happens and your on 360 and have  the game installed on the hard drive try reinstalling it, or if your on a PC use Steam to verify the integrity of the game files. If you use mods maybe check their comment pages on Nexus or the Workshop and see if anyones reported the same thing a mod could have done it by accident, theres also the program LOOT that can find some errors in mods.