[Jason Burkhardt]

Hi, recently I'm having this problem: When pressing on power button on my phone (Xiaomi S2), instead of showing me lockscreen, it shows me unlock screen (to enter pin). It does it randomly, sometimes does, sometimes not. It even brings this screen when someone messages me or I get new notification, in short phone wakes up. What could be the problem? Could it be physical problem with button itself or software problem? Had anyone encountered such problem?

[Galactic Zoo]

This is part of the phone's security. If it got into the wrong hands, unlocked, it prevents continued use of the phone.

[Mooncatt]

The screen where you enter the PIN is called the lock screen, but there are others (knock codes, biometrics, passwords, etc). So I'm not really sure what you're asking. What are you expecting to show when you press the power button?

[Jason Burkhardt]

This is part of the phone's security. If it got into the wrong hands, unlocked, it prevents continued use of the phone.

Seems like I didn't explain well about my problem.

When for example you want to check time on your phone, you grab it from your pocket and press the power button, it brings you such lockscreen:
https://cdn2.gsmarena.com/vv/pics/xi...redmi-s2-6.jpg

However in my case it was bringing me such unlocking screen:
https://www.unlockbase.com/blog/wp-c...8062145877.png

In short, where you need to enter your pin or whatever to unlock it. And yes, you read it right, when I said it was, because I already solved this problem. Seems like one application was causing this bug and already uninstalled it.