I have a 2020 Tahoe SSV that came equipped with a HLF. All the lights are controlled by a HHS4200. The HLF is supposed to be disabled when the headlights are on. I noticed last night that the high beam bulbs faintly flickered while my warning lights were activated, and returned to normal when the headlights were turned off. I checked a co-workers vehicle that’s the same year and it did the same thing. Any ideas what causes this?