The OxygenOS 11 (Android 11) update for the OnePlus 8 series caused a lot of problems to the device. Some of the major issues include excessive background applications which lead to fast battery drainage, no send button in WhatsApp when selecting emoji, and more. But, thanks to the latest OxygenOS 11.0.1 update which brings a lot of fixes for the known issues.
The latest update optimizes the background process management mechanism to improve battery life. Other notable tweaks include a fix for canvas display mode, connection stability, and improves overall stability of the device. The OxygenOS 11.0.1.1 update for OnePlus 8 and 8 Pro is currently rolling out in India. As usual, the OTA update is rolling out in batches, so you may need to wait for few days to get the update. You can also check for the update manually by going to Settings -> System -> System updates. The company will soon start to roll out this update to other regions also.

OxygenOS 11.0.1.1 update changelog:

System

Optimized the frame stability algorithm to make the experience smoother Optimized adaptive brightness algorithm, making 8,192 levels of automatic brightness adjustment more comfortable Optimized background process management mechanism to improve standby performance The quick setting has been adjusted to three lines Updated Android Security Patch to 2020.10 Improved system stability

Ambient display

Newly added Canvas feature that can automatically draw a wireframe picture based on a lock screen photo on your phone (path: Settings-Cutomization-Wallpaper-Canvas-Choose photo preview and it can be generated automatically)

Network

Optimized the intelligent 5G function to extend battery endurance capacity Optimized Wi-Fi connection to improve stability of connectivity

Bluetooth

Optimized Wi-Fi connection to reduce transfer delay Fixed the low probability issue that it was muted after connecting to Bluetooth OnePlus 8 and 8 Pro are receiving OxygenOS 11 0 1 1 stable update - 39