I saw there's already a discussion about this, but I have more to add to it since our experience was a little different, especially on our last attempt. My brother and I were playing the map together and got to the point where you pretty much play FNAF 1 with Bonnie and Chica. At first it seemed to be working well, we died to Chica cause she got too close. But every other time there would be some bug stopping us from progressing. Chica's door would be closed from the start, and we would fail the moment the power reached 95%. Every now and then when the door isn't closed, we'd fail at random points when we don't even see the animatronics yet. Sometimes both doors would be opened but the power would drain as if they're both closed. We weren't able to beat the easter egg because of the numerous amount of bugs that step had.

The point when we stopped trying was when I went down and got revived right before being teleported to the security room. But a moment after we spawned in the room, all my guns were taken away. I was given the starting pistol but I hadn't died or anything, so I shouldn't have lost my weapons. I think it had to do with teleporting to that location just after being revived, like the timing of it. Because I had weapons when I spawned in the room, it just took them away a moment later.

I would love to complete this easter egg with my brother on this map, but it just seems undoable from all the times we've tried. The closest we've gotten to was 2 AM before we failed when both doors were shut and nobody should've been able to come in, the power wasn't about to be drained either and we had the doors closed for like 5 seconds. Most of the time we'd spawn in the room and Bonnie would already be at the front door, causing an instead fail, or we'd hear Chica's jumpscare and fail even though she didn't even show up yet.

I love this map, we just can't seem to get the easter egg to work correctly after the 1st attempt of that step. Any attempt after the 1st would be bugged in some different way. I wonder if some of these could be due to us both playing the map instead of just one player playing, but I'm not sure that's what would cause these to happen. I would love to see these fixed soon so my brother and I can beat the map. We had figured out the side easter eggs like the acid gat and others beforehand, it's just this step that's too buggy to be finished. It took us around 12 tries until it took away my weapons and we called it quits.