I can't complete the DCD every time I try to run this enemies fall through the floor or will run to the other side of the room and next thing I know they are on the other side of a door you can't go through
Sorry to hear that. Can you please provide us with a short video of this occurring, so we can investigate it further for you? Many thanks and apologies for any inconvenience caused by this.
Also, I moved this thread to The Division 2 section.