Tloupis , via OnePlus 9 Pro , Jan 28, 2022 : Finally I got the update for oxygenOS 12. After using it for two days till now, I've realized that I'm having issues with my notifications. Sometimes my notifications will ring and sometimes it won't. I've searched all the settings and although I got no way to solve it, I've realized that is not the pure OS build that we use to have. How can I go back dear OnePlus?