I think I know what you are talking about.
And I did experience this with my wings (non Duotone) too.

Everyone who has windsurfing experience knows the feeling of an extremely overpowered sail which starts to push against you front hand.
The same thing happens with overpowerd wings too.

But this should not happen close the sweet spot of your wing. This is more something you will expereience if you ride it way above the recommended wind range.
Let's say a 5m wing is made for like 12 to 22 knots and you try to use it in 28knots gusts.