I assume it would be like having an over stalled kite. I experienced that a lot in the early days of foil kites. Assuming the wind is strong, the trailing edge would invert and the kite would rise up and fly on the back lines, flip around, crash back down, and repeat. There would be peaks of power, followed by no power.
When you think about it, the brake fan takes the place of the A-lines. The kite would invert and fly with the trailing edge forwards. It would be collapsing constantly because the structure and profile would be back to front.