https://www.theverge.com/2018/10/1/17924792/google-patch-pixel-xl-phone-fast-charging-security-issues-bugs-fix

Google released Android’s October security update today, bringing with it a few fixes and functional improvements for the company’s Pixel devices. Most notable among the patches is a fix for fast-charging issues which have been affecting 2016 Pixel and Pixel XL phones since the release of Android 9 Pie.

Google acknowledged that the OS update broke fast charging between original Pixel devices and some third-party power adapters that lacked USB Power Delivery, but everything should be back to normal now.