When a piston is powered from above, it doesn't always retract when depowered.
A video explains it better: http://www.youtube.com/watch?v=KM9DNfxBogw
This bug doesn't seem to affect older snapshots (all before 13w10a).
- duplicates
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MC-11193 The order in which powerable blocks (e.g. redstone dust blocks) along a wire are powered or de-powered is not clearly defined and causes a non-deterministic behavior for redstone contraptions
- Open
