rodeo360

So a few times in the last month going over the speed bumps in my neighborhood the back end of my Lexus has slammed pretty hard going at a crawl. Each time upon getting out and inspecting the backend of the vehicle I've noticed that the space between the wheel and the wheel well was awfully big (same space when you raise the back end with the button on the middle console). Upon looking at the dash board the green height light was on N both times. Each time raising to full height and lowering the the lowest and then back to normal corrected the problem.

What is causing the height to go to the highest when the button wasn't pressed and I am coming off of highway speeds?

On note, I am not aware each time of when the back has raised. It could be when I'm on the highway or as I'm pulling into the neighborhood.

Any help or insight would be greatly appreciated.