Sticky Piston don't sticking.

In a world before 1.17 update, I made an elevator using several sticky pistons to move around. However, I've updated my world, and the elevator didn't work. When I looked to see the problem, I saw the pistons no was longer pulling each other... I did another test on a different map and the problem stayed there. I am now using a ladder to move around. I don't know if another player had this problem, but I'm having it and would appreciate if it were resolved.