Seal U (DMI), Song Plus, Seallion6 ,...Bug brightness Central display

Central display brightness is not set to automatic adjustment. I actually set it up to 20%. This setting will reset itself to 100%. I cannot reproduce after how many hours, or what is causing the reset. I just set it back to 20%, 30 minutes ago. Went shopping came back to the car, and it's still on 20%. For some reason I'm 100% sure Tomorrow, for some reason it will go back to 100% brightness. Anybody faced this problem? I will update what happens if I drive to work tomorrow morning when it's daytime. As I said automatic adjustment is deactivated, so daytime at night time shouldn't influence the reset. If yes it might be a bug