do you remember hitting the wall outlet in the other room?( the blue enemies should only spawn when you do ) I think that it's possible that it got triggered somehow on it's own - but I'm not sure how 🤔
Dont think i did that, hmmmm, and if i did, i wonder what the vents purpose has now if that's the case 🤔
well in this area destroying the energy door is not mandatory and you can go around it in the vent(or at least that was the idea)
maybe some goodies and items in the vent to make it worth exploring with ether choice made 🤔