The postprocessor is not relevant, as this is post treatment as its name suggest.
What you see is the result of the toolpath calculation, whatever post processor you choose to output the cutting file.
From your snapshot, it definitely looks like a bug, but it's difficult to say without any information regarding the toolpath, the tool and the size of the vectors.
Better post your file if there is no copyright issue. You can simplify it and only include the toolpath and the vectors showing the issue.
You can also send it to Vectric support.
IIRC, a similar bug has been reported in the past in very specific cases (which does not mean there are lots of bugs in Vectric products. That's just the opposite and they patch them very quickly).
W7 - Aspire 8.517