Sticky Pistons after receiving a one tick pulse will leave the block they were sticking to behind. This bug is in all versions Except Pocket Edition and Pocket Edition for Windows 10. This is show in the images below through a Toggle Flip-Flop. Link to Pocket Edition bug report saying it is a bug. MCPE-15935 - Read Comments!
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[Mod] Neko
WAI. Redstone and pistons behave differently on different platforms.
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So... if all versions are ever all going to be the same, this needs to be added to PE & WIN 10 or removed from all other versions. You decide but one has to change.
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the versions will never be the same, as java is coded on java and bedrock is coded in c++