After installing the Cult dlc, the game does not save (or load) correctly at Ranger HQ. It happened the 2nd time now, that a member of the group disappeared after I reloaded a save. The party is complete if I save , but after the reload, there is only a white circle on the floor but that member is invisible. You can manage the missing member in the inventory and you can move the party on the map but there is no way to leave it. I finished the game with the Steeltown dlc only without any problems, so that's a new one.

Strange thing is, I didn't found anyone with the same problem here. I save only outside HQ now but I hope there is a better solution.