Chaps, my missus OP3 has some weird issue as of an hour ago. Hoping someone can help.
Basically I cannot get past the lockscreen at all. Fingerprints are rejected, and the lockscreen just repeatedly flashes. I've never seen this behaviour on Android before.
Rebooting and switching off the device has little effect. I can see the homesxreen and the icons momentarily when the device has finished booting and then if just quickly proceeds to the flashing lockscreen.
Going to raise a help ticket with OP tomorrow morning but I really don't want to factory wipe the bugger. Quite annoyed right now as the timing couldn't be worse.
Edit: Well I've made some progress but have never seen anything like this on Android in all the years I've been with it.
Managed to get into safe mode and delete all the fingerprints and set lockscreen security to none. By doing this I could now get into the OS... Except I now have odd Notification bar behaviour in that it slides up out of view for 2 seconds and slides down. Whilst up, the screen/buttons are unresponsive and are only responsive whilst it's down. Pulling down the notification shade doesn't work period.
Too tired now but I'll have to get in touch with OnePlus for further advice. I've never seen such notification bar behaviour on Android and this I believe is the cause of the lockscreen issues I initially reported.
Edit: Urgh fell asleep at 3am trying to sort this out. Here's a video of the said issue.
https://goo.gl/photos/W1rmBqMS653sDD9bA
Submitted a ticket to OP so I guess we'll see how this plays out. I've uninstalled various apps including FB, FB Messenger, Nova Launcher without any effect.