Is the laser on while it’s doing this part of the path? If you preview the job, do you see the gaps in the preview?
That looks out of focus - if that’s the case, it could just be that the white paper is not getting hot enough to burn (white reflects nearly all the light energy from a visible diode).
Use this to turn on the laser at the lowest power you can see it with (I use 0.25%), then adjust the focus to the finest point you can: