I am getting the exact same thing but with the Ortur rotary tool on the Laser Master 2 Pro. I just happened to see your post in the list and thought I would read it, even though it is not the same laser.
So this looks like a Lightburn setting or issue. I just setup my rotary tool and this was the first try. The X axis looks like it is moving the correct amount but the Y (rotary) movement is very elongated and on graphics it is skipping lines.
Any ideas from the Lightburn support team? Windows V 1.1.04.
John