SameerShekhar , via OnePlus 7T , May 9, 2021 : 3 big issue after update 1)After the latest OS Upgrade. Wifi frequently connection and disconnecting. I think OnePlus is brand now and they have to test software carefully before it's announcement. Please is request to oneplus time resolve this issue. 2) when I connect my mobile to charger and after that screen become black, even I try yo press any side button but I'm unavailable to unlock my mobile for this problem I have to drop down screen and then I press to the setting icon so fingerprint option is visible. 3) same issue with face recognition feature it takes too kuch time to unlock phone. 4) instagram Notification delay and no sound. 5) SMS notification delay.