Getting stuck in piston elevator

This bug is killing me! So... When I go to my piston elevator, which is my most awesome and my favorite build in minecraft, I go to the place where I'm supposed to stand on. I hit the button. I get a little bit pulled up by the pistons, and then the rest of the pistons extend through me! Sorry if this bug was already posted, but I'm just too sad because this is my favorite creation, and I don't want it to be messed up.

Also, I think I just found out. It is 1.11 that ruined this piston elevator. Before that, it works perfectly fine.