Feature request : Fence breach new behavior

Hello, I would like to know if it is possible for developers to add a new type of behavior when a fence is breached. I would like the plane to simply “bump” into the fence and return to the authorized region and immediately revert to the last flight mode used. Currently, the aircraft switches to guided mode until reaching the specified return point (or the center of the authorized region), then switches to loiter mode. Instead, I just want the plane to return to the area and return to the last flight mode as soon as the breach is cleared.
Thanks