Always a little material left where cut began

For example, if I cut out a square and the cut begins at the top left of the square and cuts CCW 3 times, the square cuts out fine, but there’s almost always a little material left at the top left where the cut began (which stops the piece from dropping free after the cut - annoying). Not enough material to justify an entire new pass (would add a significant amount of time to the overall job). Any suggestions on what to do? My first though was to somehow have the laser dwell at the initial point for a second or so (does Lightburn have such a functionality?). Thanks