Found in Version:
When taking the guided tour in Kemel-Ze, the guide, Barmena Lletrith, disappears when leaving each area to enter the next one. This is intended to happen next to each door, so the player knows where to go next. However, in one of the interiors (I think it was Rzarch), he disappears almost intantly after entering. I did find him in the next interior, though, but the script obviously did not work as intended here.