Piston retracts an extended piston when de-powered at the same time.

I de-powered 2 extended pistons at the same time. I did not expect the first piston to grab the second piston because they get de-powered at the same time.

But instead, the first piston did grab the second piston.

How to reproduce:
1. Build the setup from the picture
2. Flip the lever(s)
3. Notice that the second piston gets retracted by the first piston.