I built the two setups from the picture and I pressed the button and powered the lever. That worked fine but when I pressed the button and flipped the lever again, the second pistons disappeared.
How to reproduce:
1. Build the setups
2. Flip the lever and press the button
3. Flip the lever and press the button again.
4. Notice that the second pistons disappear.
Duplicate of MC-9460, please use the search function to see if your bug has already been submitted. Currently over 53% of tickets are being closed as duplicate.