Rotoscope scaling does not work porperly
The scaling of a rotoscope mask is only working properly if the monitor is neither zoomed nor has a border some where like this:
If the monitor has left / right border like this, the horizontal scaling (drag left or right border) is not working properly. Vertical scaling works well.
If the monitor has bottom / top border like this, the vertical scaling (drag bottom or top border) is not working properly. Horizontal scaling works well.