Slow it down… That is ringing and/or try horizontal scanning. It could also be your pixel resolution is not quite right.
I have struggled with the cross hatching until recently. I do not do much wood work but have seen that on my mirror work. Engraving at 900mm/min engraving vertically fixes that for me. Slowing it down like this will cause issues for you on wood as it will darken you engraves a fair amount.
How big is your build? Do you get what looks like shaking at the Z axis during the engrave?
I just read about the resolution setting that you commented to on another post. I will check what that was as I did not change it.
My build is roughly 2 ft x 3 ft and I did notice a little shaking on the Z axis. The other item I noticed is that the diagonal was not a “single pass”. It looked like it was doing 3 separate moves on the longer diagonal runs.