Affects Version/s: Minecraft 15w32a
Fix Version/s: None
Environment:I think it does not matter
How to reproduce:
1.- Take a piston, both sticky and normal works.
2.- Power it, eg. a lever.
3.- Un power it.
What is supposed to happen?
Nothing, just the piston retracting.
When the piston is fully retracted it becomes invisible for a second.