Steps to reproduce:

1. Extend a piston facing sideways.
2. Place a 2 high solid block in front of the extended piston head.
3. Place a snowlayer on top the piston arm.
4. Retract and immediately extend the piston before the falling snowlayer touch the ground.
   (Repeat the step above if the snowlayer stay at the top)

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If MCPE-14519 was fixed, you can do this with redstone.