Last night I got an escort quest in the Old Forest where the escort froze in place for quite some time. I suspect the problem is that the escape portal was generated inside a vault (specifically, the one with a lone skeleton mage guarding a stone room that contains 4 runes/infusions). Also, when I finally found the portal and killed the skeleton, the NPC seemed to magically warp over there or something.
Specific details:
I started the escort quest as normal, although the NPC got poisoned pretty early. After moving... probably no more than 10 squares from the level entrance, the NPC froze and stopped moving. I cleared out the threats in the immediate area, went back to see how my escort was doing, and freaked out a little. I tried switching places with him/her, resting for lengthy periods of time, and so on (didn't have Phase Door high enough to forcibly move the escort, though). Eventually I decide to just clear out the rest of the level, locate the portal, and *hopefully* level up enough to Phase Door the NPC over. I eventually find out that the portal had been generated in an instance of that vault with a skeleton mage guarding 4 runes/infusions, and killed the skeleton. After doing so, I hit 5 a couple times to rest, hoping that the NPC would makes its way over eventually. I think it only took 5-10 turns, at most, even though the portal was way on the other side of the map. I also never actually saw the NPC enter the portal, though the quest was still finished successfully.
Escort quest escape portal + vault = frozen escort [beta 16]
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