Pneumatics Not Controllable through 3-Wire Expander

[ifndef-define]

Came across an issue when I put a pneumatic solenoid cable on the three wire expander, the piston is powered and is not controllable via code. Putting the pneumatic on the brain directly has no issue.

This is the code used to initialize the pistons.

pros::adi::Pneumatics piston1('A', false);
pros::adi::Pneumatics piston2(adi::ext_adi_port_pair_t(7, 'A'), false);

In opcontrol, I simply use buttons to toggle the piston.

void opcontrol() {
   while(1) {
    if (ctrler.get_digital(E_CONTROLLER_DIGITAL_A)) {
       piston1.extend();
       piston2.extend();
    }
    if (ctrler.get_digital(E_CONTROLLER_DIGITAL_B)) {
       piston1.retract();
       piston2.retract();
    }
    delay(10);
   }
}

I used this test code to see the action of the pistons. The one directly on the brain's ADI has no issue and properly functions, however, the piston on the three-wire expander become powered and no longer responds to the program. Toggling the piston via the brain when the program is off works for both pistons, which would rule out a bad solenoid, expander hub, and cables.

This was on PROS 4.1.1 on a Windows laptop. A friend tried on a Mac and the same issue exists. Let me know if any other details are needed.