Fort Brachsenbrücke ending

Hi just want to make sure this is not a bug.

I just noticed today that the ending of Brachsenbrücke now has an unending flow of plague rats that arrive when you have to get the cannonball, making the end of the map nigh impossible on higher difficulties. So I wanted to ask wether or not this was intentionnal.

And if so, it’s a bummer considering I loved doing this map on legend and even cataclysm.
Not anymore I guess.


This person explained to me a while back, so i’ll just copy paste his answer.