110 Volt Outlet Acting Funny

So we own a 2018 Ford Explorer Sport, and I decided to plug my laptop into it for a long car ride. It worked perfectly fine both ways, even at the highest performance levels. I tried it on a second trip, and after a few minutes, the light started flashing indicating it exceeded the volt/watt limit. I didn’t do anything different, if anything I was probably using less power because I didn’t have my cooling pad plugged in that time. Now a third trip, I plug it in and the light instantly starts flashing, that time I did have the cooling pad, however, I had it at the lowest performance level, meaning it shouldn’t of used as much volts charging. Yet, the first time, it was perfectly fine. Should I have it looked at. I am a student at a vocational school for automotive repair, so should I get it fixed there if it is an internal problem, or is it something that needs special technicians to fix.