ToME: the Tales of Maj'Eyal

Not sure if this is really is a bug or supposed to be, but in 1.5 final I had an escort portal that was situated inside a vault (one of those small vaults with the 4 skeleton mages). The portal was in the back room with the runes/infusions.

I'm not sure it is considered a problem in general, but if it happens for those new vaults where you use a teleporter to go inside, it will be.