Here is the C2D file that had the problem:
Turtle Rock.c2d (596 KB)
If you extract the GCode and load into NC Viewer (attached below), you can see starting at line 1745 that the machine is just finishing a contour. After that, it drops and continues cutting on the same contour, i.e. a slot. It finishes the first contour at 6930, then moves to the second contour that completes the pocket.
Instead, it should move over to the other contour and cut that before dropping.
Turtle Rock.nc (231.4 KB)