The bug fixing includes occasional failure of NFC, dropping of gaming frame rate, lagging issue in MX player, and the issue where play store could not install the app. Optimization of several features brings in-call stability, a bit more efficient power consumption, improves alarm clock UI, and the user experience when using split-screen.

OxygenOS 11 Open Beta 4 update changelog:

System

Optimize the stability of the call Optimized system power consumption Optimized some UI display with Alarms Optimized the user experience with a split-screen of apps Fixed the issue that gaming frame rate decreased when pulling down the status bar Fixed the issue that NFC cannot be turned on in a small probability Fixed the issue that Play Store could not install the app Fixed the lagging issue with MX player Updated Android security patch to 2020.11

Network

Fixed the low probability automatic disconnection issue with Wi-Fi

OnePlus 8

Global: OTA India: OTA

OnePlus 8 Pro

Global: OTA

The Open Beta 4 update for OnePlus 8 and 8 Pro is rolling out to those users who have already enrolled for the beta program. It’s worth mentioning that the beta update may contain bugs. So, it is advisable not to install any beta update on your primary smartphone. [source | via]

OnePlus 8 and 8 Pro gets OxygenOS 11 Open Beta 4 with November 2020 security patch  bug fixes  and optimizations - 55