When I was working on an elevator, a piston would not let the toggle switch work because it would stay extended. I am sending a world file so you can see and use debug tool.
MC-89572
Pistons stay extended without redone signal(for particular ones)
Resolved
Duplicate
0
Will Rantis
(Unassigned)
Unconfirmed
redstone
Minecraft 15w39c
Retrieved
Please attach screenshots of the affected pistons. Make sure to make nearby redstone signals visible, please.