https://www.techradar.com/news/iphone-xs-and-iphone-xs-max-reportedly-hit-with-a-charging-bug

The brand new iPhone XS and iPhone XS Max handsets have only been in customers' hands for a week, but already a problem has emerged – namely that some models don't start charging when plugged into the mains if the screen is off when they're connected.

At the moment the issue is only anecdotal, but based on forum posts and YouTube videos it seems to be genuine, even if the scale of the problem isn't clear yet. We've tested charging behavior on our own iPhone XS in the TechRadar office and it works fine, so this isn't something that's affecting every handset out there.