Hi Donnie, apologies for taking so long getting back to you. I determined that the problem is caused by the origin being set to the bottom left corner with a parallel cut angle of 0 degrees. Thanks for pointing it out, I'll have it fixed in the next version which should be out by the end of the week at the latest.
EDIT: The problem seems to arise specifically if the origin is anywhere below X:50% Y:50%, if it's at 50%,50% or above it still seems to work with 0-deg parallel cutting operation.