OnePlus is now rolling out a new incremental update that fixes a bunch of bugs that the initial Android 10 update brought to the OnePlus 6 and 6T. The update improves system stability, updates Google security patches for December, and squashed a lot of bugs. Here's the full changelog: System Fixed the issue with a black screen appearing after unlocking the device using a fingerprint Fixed the issue with the animation logo while rebooting device Fixed the issue with device heating up while charging Fixed the random disconnection issue with 5Ghz hotspot Improved...
Source: https://www.gsmarena.com/new_oxygenos_december_update_for_oneplus_6_6t_brings_list_of_bug_fixes-news-41183.php