In the quest TR_m2_TMo_GoneToGround in Tel Mothrivra, the script on TR_m2_Staron that is supposed to move him to Helnim still points to the cell Cephorad Keep, Interior. As a result, he will stay in the inn and act like he teleported out when you talk to him again.

And in a minor issue, if you already have the topic "scroll" (which you get from a vanilla Hlaalu quest), you can bypass some of Staron's dialogue, making him ask you for a scroll without telling you why he needs one. This doesn't break the quest, though.