I found a glitch where on level 9 if you put the mover above the slider above the rotator on column 7 and a mover on column 8 in play it works but in step by step it doesnt
I think some of it is how the rotators work. I noticed when I got stuck on L11 that the result would flip between two or three patterns of motion, usually changing around the rotator block. Of course, there's really only two types of blocks for L11, so it might be anything