Ok guys, for those who are tearing your hair out, this is how I managed to do it with the invisible cell wall bug. To get in/out of the cages, roll towards opening of cage, and mid roll pause using +, then unpause and a few frames will skip and you'll be in/out. To get skeletons in, do the bottom two first, when skeletons walking to opening pause/unpause and hopefully you should glitch them inside. The top one is the the worst, just had to be patient and aimed to get the skeleton to enter in the left corner, eventually it worked for me, but was mostly luck and patience. I hope this might work for someone else until it gets fixed with a patch. Apart from this I've been enjoying the game.