When I press a lever next to a piston very quickly it glitches it like gets invisible for a second. Look at this video --> http://imgur.com/4Z9fr3P
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This issue may be relates to MC-89262

Confirmed for 15w47c.

confirmed for 15w49b

@unknown please make that video with the debug screen enabled (hit the F3 key). Videos or screenshots with no debug screen are mostly useless for us.

Nevermind, It was just my optifine. I'll report it to optifine.
Confirmed