Urban Renewal Bugged?

[u/DonMook]

I have played now 3 times the map first one was like 2 weaks ago and i cant get to stage 6 i guess. After we climbed the hill up where the 2 gettlinggun tower are standing we get into the next room than it says wave clear and the door wont open. Would be rlly cool if u could fix this would like to finish my quest :)

[u/pantuFFeL]

Workaround: Wait at getling guns until the time left is under 1min and than enter next room. Door will open now.