A properly spined arrow jumps off to the left (right handed shooter) and the vanes never come close to a flipper style rest.
I am always open to learn. However, I have to say, the above statement is a revelation to me. Are you referring to the "Archer's Paradox" and meaning that the tail end will bend away (flexing) from the window and clear the rest before any contact by a vane can be made? Don't count on it.