INDY-JOE

In my 2018 Canyon when I go into reverse the backup camera display is to bright in certain situations. When it is dark and especially when it also rainy I have to cover the display because it is so bright it is difficult to see. As soon as I stop and shift to drive during those few seconds the camera stays active the display is much dimmer and really at the right intensity. Controlling dash brightness does nothing. Is there a setting I'm missing somewhere? I hate having to cover the display just so I can see in my mirrors rather than 100% relying on the camera display. Thoughts?