https://wccftech.com/google-still-hasnt-fixed-pixels-sensor-issues-five-months-after-they-were-initially-reported/

Major software upgrades have become synonymous with broken features for Pixel users. We've seen this happen for years when a newer version of Android wreaks havoc in some Pixels. This time around, it appears that a lot of Pixel owners seem to have broken sensors ever since they received the Android 10 upgrade. Several features such as Auto Brightness, lift to wake, flip to silence, auto-rotation, and squeeze for Google Assistant haven't been working as a result.

A wide range of Pixel phones, including Pixel and Pixel XL, Pixel 2 and Pixel 2 XL, Pixel 3 and Pixel 3 XL, Pixel 3a and Pixel 3a XL appear to have been affected. As expected, several forums such as Reddit, XDA Developers, and Google's support page have been inundated with complaints from disgruntled users. Most of these are well over five months old, and the only solution provided by Google is to wait for a software fix. Some phones managed to fix themselves after the patches arrived, while others sit unrepaired.