Stepper Motor Shield For Arduino(DRV8825)

I have a couple of these shields and the stepper connected to Y (even if run more often) gets decently hot while the stepper connected to X (just standing still) gets very hot (identical bipolar steppers). I understand that this happens because Stepper 2 holds the position and that I can turn them off with "digitalWrite(M1en,HIGH);". While this seems to work for Y it does not for X. Or is there an additional hardware switch. I just want both motors to turn and then "sleep" and wait for the next command. Thank you