Cliping into extending block attached to sticky piston

I built a blaze farm but the funneling system with sticky pistons (by Mumbo Jumbo) suffocated the blaze as they fell onto the pressure plates. So I tried to recreate the situation and found out that it also affected the player when I stood in front of a piston with a solid block (polished Andesite) on it, and activated the piston with a lever. I don't know how to ecactly recreate the bug but sometimes I managed to clip into the block. Find Mumbo's simple efficient blaze farm on YT to check the funneling system, because the blaze are really good at "activating" the bug.