Update 1: 2018/08/13 2:27pm PDT
There are some reports of 5" 2016 Pixels also being affected, but the vast majority of complaints are coming from Pixel XL owners.
Update 2: 2018/08/14 11:03am PDT
Google has provided us with the following statement:
"We're aware of an issue where non-Power Delivery (PD) USB-C chargers no longer rapidly charge the 2016 Pixel and Pixel XL after the
Over the past few weeks, some owners of the 2016 Pixel XL have reported problems using quick chargers on Android P.Read More
[Update x2: Will be fixed soon] 2016 Pixel XL owners experiencing issues with quick chargers after Android Pie update was written by the awesome team at Android Police.