1. Put a Piston or sticky piston facing one of the sides(Up or down will not cause the bug).
2. Put 2 blocks of redstone, one in the side of the piston (will not cause the bug if put on the front), and one in the top of the first one.
3. After the piston is powered, take out the first block of redstone, then the second.
4. The piston will be powered, but with any type of power, until you put a block on the side of the piston.