Why are several features on my LG G4 failing to work?

[AC Question]

So my G4 has had some problems lately with battery calibration and bootlooping, but recently, I turned it on and its working, but in a really not-working kinda way. The background is the default background (I use Muzei), the home and app-switch buttons dont work, the phone displays no notifications, and it doesn't lock even though it acknowledges it has a lock screen set up. I have no idea what could have caused this or how to fix this, and any help is very appreciated!

 

[belodion]

Try Safe Mode, to test whether a third-party app is causing trouble.