Pixel 3 rounds the display corners artificially

The users of the latest versions of branded Google smartphones have come to a rather unexpected conclusion - it turns out that the manufacturer, at the program level, rounds the corners of his rather rounded displays.
The first to notice this interesting feature on his Pixel 3 was one of the users of the Reddit portal, writing that when he turns on his phone, his display starts to be noticeably rounded and remains so until the phone is turned off. The next time you turn on "transformation" begins again.
Apparently, Google thus decided to correct the use of displays in the smartphone of not that degree of roundness, especially given the maximum roundness of Material Design 2.