I was searching for this one for a while too, it's the rare variant of the "Crazy Bunny" enemy. I only found one room that they spawn in, but the room just so happens to be the one I'm stuck on and also extremely annoying to get to :/ (see below)
I also spent way too much time trying to brute-force this one lol. Legitimately interesting puzzle, though as seemed to to be the case with a lot of this area, I just wish the dev had made it more obvious that you can't just barely run through like it looks like you could :/ (solution below)
(btw, make sure to call the platform at the end of the room back down after getting the last chest, just in case you die and need to come back)
The only problem is, after the magenta chest, then there's a whole other section. Fortunately, simpler platform-moving puzzle with much less stakes. The left exit at the end of this one seems bugged for me, some kind of warp error, but the right side exit is where the room with the "Crazy Bunny" spawns are.
...as well as what looks like the last balcony, closely guarded by another pusher... and I'm really not sure if it's even possible to get past this one, I feel like I'm missing some puzzle like the last three times I got identically stuck in this update, but as per usual I got nothing so far. And it takes like five minutes to backtrack if you mess it up, since it knocks you down to the death room, so after like seven or so tries I think I'm calling it here on my part. Someone lmk if you pull it off tho lol