I built them on 1.13 but stopped during the 1.14-1.16 updates. I started again on the 1.17.30 update and it would start as normal and then go down and up by itself, becoming inefficient. I updated to the 1.17.32 and the promblem persists. I tried on another phone to see if it was the phone and the elevator still gliches. It happens to any elevator that used obsevers, sticky pistons, and slime. If you can solve the problem, it would be awsome, because I like to use the elevators in most of my builds but now I can't because it makes it harder to go between floors.