My view!
Yes I have seen it happen also. The view from the cockpit of where the holding point line is in line with the tip of the aircraft nose can be very illusory. I regularly have my f/o think I have crossed the line and speak up as I park my plane right up to the holding point for that very reason to allow room behind. My view form how I sit in the 737 is that I bring the holding point line up to but not past the L2 cockpit window trigger handle. This position looks as if the aircraft nose cone is heaps over the line but infact isn't.