not sure how this happened, but the platforming area just before the Pit spawned no enemies either. the only thing that happened was we were able to capture the plate, with no enemies spawning, and the vex milk did not drain (Obviously). we were able to get into the boss fight room, by using the birds nest on the sides of the pit, nothing happened there either. eventually one guy left, another joined and i was able to trigger the pit event by going back to the other side and the normal spawning started, but the vex milk was still there, even when the actual enemies spawned into the vex milk, which we had to kill through the milk, when we killed the last one the milk disappeared and everything proceeded as normal.