Judd, I agree with you regarding cars being so complex, their systems do appear to get "overwhelmed" at times. Just a shame to find this with new cars, you would think there would be more in the way of "identification" of errors to help users work out what/why things are happening.
In my car I have checked all fuses, globes, etc.. disconnected and connected a trailer, had auto-lights on/off, etc.. even had the radio console off when I started the car, to try to find out what is causing this error, or more-so, why is it intermittent -Which I think is the most frustrating part!
I am thinking about buying one of those doo-hickeys that connect to the car to read the error messages, has anyone got anything to say about those, regarding newer cars? (I also have the 2020 Forester (Hybrid), which just went nuts on me, turns out it is a known fault to do with a dying battery!).