If you break a block that is in the middle of being pushed by a piston, it will show the "Update!" block particles. (See screenshot)

Steps To Reproduce:

• Use a clock setup shown in the pictures
• Place any block on top of the sticky piston
• Break block on top of the piston while it is in motion (even in survival, just punching the block will produce the particles)

Tested on Windows 10 PC (game version 0.16.2) and Samsung TabPro SM-T520 on Android 4.4.2 (game version 0.17.0.2)