Actually it does say I'm the article that it's not tied to one specific form of charging as some are seeing it on wired, third party wireless, and on the Pixel Stand as well.
But isn't this the reason they say not to use a phone while charging? Obviously not to the extent of getting so hot it shuts down, but that using it while charging causes increased heat. I've had phones in the past do this (both from Google and other OEMs, and on smartphones and flip phones). It's why don't do it unless have no other option (say I'm on a call and the battery is getting dangerously low and have no other phone to switch to).