Octopi and neje laser engraver colapse

What is the problem? When ever Im printing using the octopi with wanhao i3 2.1 and then trying to laser engrave using NEJE Master 20W the printer just stop in place.
the temp stays the same, the print head just stops

**What did you already try to solve it?**updating versions, printing not using octopi(works but what the point)

Additional information about your setup (OctoPrint version1.3.10, raspberry pi 3 b+ , wanhao i3 2.1 and the nejemaster 20W laser engraver

I know Its a weird one and I hope this is the place even when talking about laser engravers.