[Bug] Security issue: Bypassing screen lock on Nexus 4 with stock Android 5.0.1 topic

I have discovered a security problem in Android 5.0.1. I've tested it on my Nexus 4, but it might affect other devices with Andoid 5.

On a lock screen you can swipe down to bring up a menu, where you can turn off wifi/bluetooth/flashlight. The issue is: if you start tapping on a flashlight icon really fast, it will crash the graphic interface, and for a second the phone will become unlocked, and by repeating this multiple times you can get access to pretty much anything on the phone, that doesn't have additional protection.