Newbie. Need help. It only seems to happen on certain images. Using ortur laser master pro 2

Please refer to picture. Any idea on what I am doing wrong. It seems to be happening on certain pictures but not all. Not sure if it is a laser issue or light burn. Any suggestions would be appreciated.

You appear to be very close to the results you want.

If the engraver isn’t walking around on the workbench,
and if the work piece isn’t walking around on the workbench,
then the lost motion seen here is coming from the belt drive.

Check the belts, pulleys and set screws to make sure they’re tight.
If everything seems fine reduce speed 25% and reduce power 25% and retest.