https://wccftech.com/some-google-pixel-3-users-report-overheating-issues-while-charging/

The Pixel 3 and Pixel 3 XL had been doomed to fail from the very beginning. A slew of leaks ruined Google’s big surprise and both the devices have had a plethora of problems once they went public. Today, some users report that their Pixel 3 is overheating while charging. Disgruntled users have taken to Reddit, Google’s Product Forums, Twitter, and even YouTube videos describing this overheating problem. The devices get excessively hot during charging and shut down shortly after

It isn’t unusual for your phone to heat up while charging but these Pixel 3 overheating reports are certainly a cause for concern. Wireless charging seems to be the culprit here, according to the number of complaints. Users have noticed it on slower third-party chargers, Google’s Pixel Stand, and even on some wired chargers in select cases. The Pixel 3 also overheats while performing mundane activities such as initiating a video call and watching a live stream.