[Q] Phone won't let me unlock the screen (XT1068, Lollipop) topic

When the phone boots up and the SIM PIN screen shows up, after entering the PIN the phone shows "Please try again in 26 seconds", effectively not letting me unlock the phone until half a minute has passed. I have rooted the phone but I haven't tampered with the security settings other than going to settings and clearing credentials (Settings -> Security -> Clear Credentials, I did this to get access to the None and Swipe methods of unlocking the screen)

What causes this, and how can I fix it? It's really annoying.
Any help is greatly appreciated.