Riding a Redstone elevator causes player to crouch and phase into the bottom block.

I made a redstone elevator, but it caused the player to crouch. When I reached the bottom and started going up the player crouched and went through the bottom block.

 

Link to video

https://1drv.ms/v/s!AhYXzvtmx_5ggimC2H5Irouwf9r_