This is the first time I've heard of this!!!. My EZ is at the aft CG limit.
I have a little over 2600 hours on mine and I've never experienced anything like this.
The only thing I can think of that I would consider "interesting" ; Water droplets pool up on the trailing edge of the elevators, and will actually travel forward on the upper surface of the elevators.
Here we are, scooting along at 165 kts, and this water is moving forward on the elevator!
Waiter