After the android oreo update, i have had some serious issues unlocking the phone. Today has been the worst so far. Constant lag when I either try to unlock the phone by using the fingerprint sensor, or the unlock button. When I unlock it, the screen stays black and only the navigtion keys light up, this black screen-lag continues for up to a minute and the phone cannot be used.
I have also had some frame rate drops from time to time while using the phone normally.
I don't know what to do and I'm seriously starting to regret buying this device.