I want to preface this by saying I know the ins and outs of the Minogon Plant and I know how it's supposed to work.
In certain room there are a pair of ballistaes. They can be disabled, and the prompt indicates they are shutting down when you do.
The bug is that they do not, in fact, shut down, and they continue firing.
I'm fairly sure this bug is ancient, but it'd be nice to have it fixed since those things can kill any low hp character fairly quickly, making exploration rp runs impossible without somebody dying in the way.
Edit: I'm sure this has been reported time and time again over the ages.
True is that the whole dungeon could be reworked and updated, but just having this little thing working as intended should be doable to achieve quickly.