Help with Non-Continuous printing and ZQ500 series



I am developing an app using Xamarin.iOS and am having issues when connecting and printing non-continuous media (Continuous printing works fine).

I am using black mark media, during calibration it successfully proceeds to the next black mark. When printing data, it does not.


When I first connect to the printer I do the following:


1.) Check and set the printer language to ZPL:

- ! U1 setvar "device.languages" "zpl"


2.) Set the Media Mode to Black Mark, Calibrate and Save (It successfully calibrates and feeds to the next black mark):









3.) Test print out (Issue - it feeds out a small amount but does not continue to the next black mark and stop):










I am fairly new ZPL so hoping it is a simple solution. Let me know if any more information is required.

Any assistance will be greatly appreciated.