I did several heisting quests for Kari and sometimes she does not open her mouth. Audio is heard, her emotions work (I can see when she's happy/sad) but her mouth is shut. Tried logging off, /reloadui, same thing.
Also happened to the tailor, Percius Loche, he does not open mouth either. I also asked several more players that were there with me and all of them responded that they couldn't see him talking.
There's definitely some kind of problem with NPCs talking animation in the Hew's bane/Thieves Guild.
EU server.