Gilgrin.4715

Just to be clear: Tonn is following the player, not the rest of the team. He won't go anywhere without the player leading the way. He won't go anywhere until the NPC under the demolished tower is dead.

This happened to me because there was always an NPC alive under the demolished tower #2 (this was before the fix, so don't know if it was fixed), it happened every time until I realised what was going on. I killed all the enemies around all the towers before demolishing any towers and Tonn, or the marmox, would finnaly not get bugged out.