Lately, I keep getting my lockscreen like this. By default, there should be a blue banner at the top, it isn't such a big dealbreaker, but I actually want to figure out why this is happening.

I completely flashed my device, but i still get this....
does someone has any idea?

Edit:
Just noticed that the emergencycall button on the left bottom isn't showing either. But when I press the invisible button, the lockscreen crashes and doesn't react anymore...