Making a little brass plaque, which is symmetrical about the X and Y axes. Yet, as you can see in this screenshot, the toolpath permanently does something weird around the bottom left corner detail. The CAD and STL are aligned, there should be no reason for this…
it looks like you’re using pocket + contour. what is precision set to. if 0, then what is preferences -> display -> animate set to? please provide a screenshot of the pocket op (like this) or attach a workspace.
if precision is very low or defaults to animate which is low it can cause artifacts.
I should add that the contour feature of pocket is meant for curved surfacing, not flat pocket bottoms. on flat surfaces with fine features, it can run into trouble.