Installed a 4100NEX in my Jeep over the weekend along with a rear backup camera. I opted to tap into the power at the head unit so I could turn on the camera when I want. Things work as they should, camera comes on when in reverse, shift out of reverse it turns off, I can turn on the camera when I want. My issue, or possible issue is that when I park and turn the ignition off, the rear camera appears on screen no matter what the source was prior to turning the ignition off. Is this as designed or is mine doing something out of the ordinary? I prefer it did not, so I'm hoping there is a fix. I could not find any setting related to this in the camera settings. Thanks.

When you turn your car off, do the brake lights come on as part of the night features? I know if I unlock my car with the key fob at night the brake lights also trigger and thus active my rear camera screen on the head unit.

Is the CameraView feature turned on? Try to swich it off and check.