20" length when robot has balls that are dumping.

The robot is like a big LINQ with a road for balls on top of the shovel. Robot inspected is 13" by 19½” dimensions even checking the arc of motion at inspection. But when it is full of balls the robot is dumping over its back and the momentum and the weight of the 14 balls make the plastic vex parts bend and the front wheels to lift 1/8” while it is in motion and it goes over the 20" length by measuring it while it is in motion with the balls. When it has 7 balls it does not bend as much and only lifts 1/16” does not go over. You can not use a 13’ by 20" box to measure this because it happens when the balls are coming out because of all the weight from the amount of balls being dumped and the speed of the motion? Is this legal?
Another robot is like a big LINQ inspected and is 13” by 20” dimensions even checking the arc of motion at inspection. But when it is full of balls the robot is dumping over its back and the momentum and the weight of the 16 balls make the quality of the plastic vex parts bend when it is 3 ft tall and the wheels are not lifted off the ground with the height and the front wheels do not lift off the ground while it is in motion and it goes over the 20" length by measuring it while it is in motion with the balls. When it has no balls it does not bend as much and does not go over. You can not use a 13’ by 20" box to measure this because it happens when the balls are coming out because of all the weight from the amount of balls being dumped and the speed of the motion also the wheels do not go off the ground? Is this legal?

Robots cannot exceed the maximum dimensions of 13" x 20" at anytime during a Match.