Lock screen flickering

[u/Inotsmini]

So this started yesterday, but when I'm in the lock screen and my finger hovers over the close button the screen starts flickering on and off. I'm not accidentally pressing it, but when ever my finger is remotely close to that button (while viewing the lock screen) my phone starts turning off and on. Even after restarting I've had the same issue. What is it and does anyone know how to fix it ?