Deviation of horizontal line during carving

The laser stops firing in the meddle of the job but the head doesn’t stops. When that happens, the head eventually stops, moves back and tries to keep engraving where it stops. The problem with that is that when that happens it never restart in the same position, making a really noticeable line along the path. That line is just shifted from the “original path” that the laser was supposed to follow. It does that no matter if the engraving is vector or raster. Please help!