In a post on Apple's support forums, users describe several different problems of varying severity. Most commonly, plugging a sleeping iPhone XS to charge fails to wake up the device and initiate charging. Often a tap on the display will wake up the device and cause charging to begin.
Some say that even after tapping to wake, their phones won't charge. Others experience an issue where their phone will freeze and not wake.
Unbox Therapy demonstrates several of these issues in the video below. Take a look, try it on your device, and let us know what happens in the comments!
Apple has yet to officially address the problem. You can follow iClarified on Twitter, Facebook, Google+, or RSS for updates.