The pistons aren't fully working - they won't go back to their original position when pushed by another piston. When I make a stack of pistons and connect them all to a lever, turn the lever on and off, the pistons will not go back to the place where i spawned them - they will just float where they were pushed by the piston below or next to them.
(I'm using an Android LG Optimus L5)
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Probably due to the piston timing and the fact that extended pistons cannot be moved.

But they work perfectly in the pc version. I've seen plenty of people on youtube upload totally working versions of extended pistons, ive copied them exactly as the person who made them did, but the pistons still dont seem to do what they do in the PC version

@unknown, did you really copied it exactly, including the delay of repeaters? In PC the upper repeater should be set to 4 tick delay, and the lower one should be set to 2. In PE, on the other hand, it seems you need 8 ticks/4 ticks delays respectively because of MCPE-14606.

I'm having similar issues on xbox one with a jeb door and castle gate they used to work but now only one row of pistons activate its not a timing issue because they work fine on 360.
No matter how many ticks i set it to the pistons don't move
I'd put pics but it won let me