Google is working on a fix for the Pixel XL's fast charging issue
 

On Monday, reports of a problem with Pixel XL devices' fast charging system surfaced after users updated to the latest Android operating system, Pie. As a result of all the reports, Google says it's aware of the issue and is working on a timely fix....

https://www.engadget.com/2018/08/14/...harging-issue/