Problem with Pocketing

I have a problem with my Stepcraft 420 when I need to pocket around simple shapes like circle's (30mm diametar). It's all good for couple of minutes, it pocket's around them and then machine goes back over already pocketed shapes and starts pocketing/profiling them.
I use Vectric Aspire 9.0 and Mach2/3 Arcs mm as a postprocesor. This is the link to image: https://ibb.co/g1UXwz