Found 2 Bugs in Mothership Zeta DLC with TTW. One bug is in the Cyro Chamber. The other is ALL the Teleporter Matrix's showing they can be used, when used NOTHING happens.
The Cyro Chamber bug is two doors lock behind you in a freeze chamber where the aliens are experimenting with humans. You hit a switch in the chamber to kill the aliens within it. When they die the doors open for you to enter. When you enter after a few seconds they close on you, leaving you in the chamber with two locked entry doors that require a key to open, and there is no key.
Read some wheres them doors are on some timer, and eventually reopen. Confirmed on wait 20 mins and the doors never open. The only wy to get them to open is in the console type "unlock" which I think will break the rest of the areas behind that if you console through the doors.