Gated to Tomb of Kings and had a few monsters outside come after Tanivar as he went in to see if I remembered the barrier passwords. Opened the barrier, killed a gargoyle, and found I couldn't gate out. Went out the exit stealthed and a few of the monsters came at him but didn't attack though they followed him until the middle bridge on the way to the Ter-Mer moongate. I'd waited a bit and their health bars had gone away but they still followed him.