Different number of opponents from loading to loading Mass Effect 2 (Mass Effect Legendary Edition)

I play on an insane level of difficulty. I noticed that in the task of recruiting Mordin, there are more enemies, sometimes less. And a couple of times it was like this. that after killing a large number of enemies, in the next. a few appeared in the room at once. I died, but on subsequent downloads of this place, these enemies were not. Among other things, cartridges
in the ventilation switching room do not always appear the same. Sometimes they fall out, sometimes they don't. That makes a big difference.
For some reason, I did not see any complaints about this. It often happened that I simply did not have enough cartridges.