Not that, I mean it's like INSIDE other blocks, like it's askew on top of the tiles and can't be accessed.
It could just be a rare occurrence I'll try it again later.
The switch is at the bottom-right - you have to play as the other character to push it, but the block appears above them.
I actually retried this a minute ago and it worked fine, it must have been a rare thing. Although I did have trouble with the hack not coming up with the other character for a bit.