When my 2020 Bolt is plugged into my 220v home charger, there is a small flashing red light just behind the large green charging indicator in the center of the windshield. It seems to blink continually regardless of the state of charge in the battery. I can not find any reference to it in the owner's manual. I have always felt that a flashing red light meant something that one should take seriously. Can anyone tell me what this light is indicating? Thanks.