https://wccftech.com/oneplus-8-pro-oxygenos-update-supposedly-fixes-the-green-tint-issue/

The OnePlus 8 Pro is an exceptional device and we cannot take that away from it. However, a few days ago, users all over the internet started reporting a display issue where the screen would display a green tint. Although the issue is nothing new, seeing it on a $900+ flagship was alarming and to some extent, saddening as well.

The green tint issue was accompanied by a black crush issue as well, both screen issues, and at the time of reporting OnePlus did talk about addressing at least the green tint issue in the upcoming update.