Originally identified on a SONY SOL23 (Android version unknown) but I confirmed on my Samsung Galaxy S6 Android 5.1.1 single player creative.

Steps to reproduce:
Build a horizontal line of blocks attached at one end to a sticky piston. Stand on top of the first block facing the sticky piston and activate it. The blocks will shift as expected and the player will be standing on the last block. I.e. the player is teleported in location (or instantly pushed by the piston) from the first block in the line to the last one.

I expected the player would only be pushed one block down the line, not all of them.

There appears to be a specific position the player must be in when activating the piston to get this to work. I can get it to work repeatedly in the same creative world, but sometimes it seems the placement or alignment of the player is not right so the player is not teleported.

This only works with sticky pistons. I could not reproduce for regular pistons. I activated using a lever, but presume other activation methods would also work.

Also affects other mobs standing on the first block being pushed by the piston.

Has not been tested with LAN players.