Label printers. Zebra TLP 2844

Hello,
I’ve been trying to set up printing with Servoy on Zebra label printers, but I always get into trouble.
Seems like I succeed, but only for two or three labels in a row. When a try to print a fourth one, the printer does print the label beyond the boundaries. I restart the printer and it works again for a few more labels…

I wonder if anybody can help me with it.
Thnak you.

What page setup do you use/need?
How do you print the labels? One by one - manually?