Some consoles are getting bricked since the latest Switch update because of this problem, that's why it gained visibility.

More info on that here:

https://www.reddit.com/r/NintendoSwitch/comments/86wu9t/psa_...

Both the update and third party accessories seem implicated to a degree.

It's absolutely insane that Nintendo still has no way to backup saves in the event of console failure. This compounds the already ridiculous situation where you risk bricking the console when you plug it in to a charger.