huawei ascend mate unlockscreen issue

[Kobe]

hey guys,

I have a weird issue with my huawei ascend mate.

the unlocking screen sometimes just doesn't show up.

and I can access my phone without giving the pattern.

sometimes I also have to press the power button 3 times to get my phone out of sleep.

I have tried this with a pin code unlockscreen and had the same issues.

security settigs:

- screenlock: secured with pattern

- automatically lock: immediately after sleep

display settings:

- sleep: after 1minute of inactivity(but pressing the power button also puts it to sleep i guess?)

version:

- android 4.1.2

- Emotion UI 1.5

I hope someone can help me

thanks already for trying.