When A Piston is in this form https://prnt.sc/qzwny4 the piston on the right is pushed up and you are crouching in its way (when there is a roof) you can see caves, the surface, houses,
basically Xray
MC-171753
See Through pistons.
Resolved
Awaiting Response
0
I am unable to reproduce this with the limited steps you provided. Could you make the steps more detailed and add a video or screenshots of this bug happening?