You should've returned it and gotten a new one. It sounds like a hardware issue. I've used a 2018 MacBook Air as my daily driver for a while (to cut down on wei

You should've returned it and gotten a new one. It sounds like a hardware issue. I've used a 2018 MacBook Air as my daily driver for a while (to cut down on weight for my bike commute) and never experienced the problem you described.