Understood. I was just pointing out that many people have reported the problem of very slow charge rates when the Pixel 3 is connected to Android Auto via cable - even with Google's "official" USB-A to USB-C cable.
FWIW, I have another oddity that popped up with AA simultaneously with the change in charge rate:
I use PowerAmp Beta at the gym every morning and, yes, I do close the app when I am finished. However, lately this odd thing happens when I plug my Pixel 3XL into Android Auto - no matter what I was listening to on the headunit (Sirius XM, media from a flash drive, AM/FM radio), it stops and PowerAmp opens on the phone and begins playing through the car audio system.
This *never* happened before, not with the 3 XL, not with any of my previous Pixel phones. Not sure if it is a PowerAmp update thing or an AA update thing...