I am also facing the same issue. Rather I have faced this issue always irrespective of any software update and for any version of oxygen OS.
Also, whether it's a 60 Hz display one plus series phones or 90 Hz display one plus series phones, battery draining has always been an issue for all one plus model phones.
But rest all hardware and software features are exceptional barring the battery life.
I think all the notifications we get since this update are not helping to save energy...
Never had ANY issue with battery ever. you'll have to do some troubleshooting yourself, this is not a general issue.
android is quite verbose to tell you what drains battery you know. It's easy to check app usage, and see what's happening
I find that resetting wifi, mobile and Bluetooth settings restores my battery drain issue. I've done this with the last 3 updates to resolves my battery drain post update.
thank you for finding that out. personally I have no issue with mine, but since that work for you, it will work for some of us here.
thank you for the good dig.
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