Port 30013 connection crashing at output transiction

Greetings URCommunity,
I am having an odd problem with my robot.
I am getting feedback of the joints positions but when I set my standard digital output 3 to 1 it stops receiving feedback or rather only after a couple of seconds.
My output is a DC motor.
Has anyone had similar troubles? This crashing only happens when it is this output which is raised to 1. I can raise all others and it keeps responding well
Any help would be very much appreciated
Best regards