Getting arc pierces on lead in on inside cuts

Just checked the pictures again, the divots are not where the lead in is in the drawing!
Can you post the drawing and the resulting cut as those above do not look the same.

That is for sure over-burn at the end of the cut.
You can check that by stopping a cut before it finishes and see if that divot is there or not, the do a full cut.
The reason for that is, you have a long lead in that overlaps with the cut path due to the kerf being 1 to 1.5mm wide, then near the finish there will be no more material left on one side as that part was already cut, hence the full force of the arc is on the remaining material.
There are two solutions for that, one is to issue an M5 from gcode before the end of the cut, the other is to set the post processor to move the end of the cut to about 0.5mm before overlapping with the lead in.
Can you please do a test cut and stop it before the end, about 2 or 3 cm before and report back ?
Thank you.