
The only save someone sent with this problem has Hendak halfway to the back area where the cells are, in the doorframe. This would seem to indicate what Cuv was saying that he was seeking his "home" point but was unable to reach it.
Someone on Ironworks just posted on this and their Hendak completely vanished so have high hopes for a save with it. I am going to run through it with SetHomeLocation pointing to the location that Hendak should arrive at when he finishes his wanderings.
I know that sometimes the engine misses checking impassible areas because I have seen it in playtesting. One of the areas that is impassible is the map in the Planar Sphere. I needed to test vampire domination for a long time but didn't want to get whacked so CLUA'ed a bunch of vampires and then Ctrl-J'ed the PC to the centre of the map where they "couldn't" reach me. Well, occasionally if the engine was too busy with other things it would forget to check the impassibility and one would run right across the "impassible" area to get to the PC. So it might still be possible for Hendak to at least make it out of the visible/accessible area to reach that far-off home point in the void.