Why is my lock screen randomly changing on my HTC One M8?

[AC Question]

My screen on my HTC One M8 will randomly turn on, but it won't be the regular lock screen, and I have never changed my lock screen. It turns into an 8-bit like lock screen with just the time and temperature, and I cant unlock it, I just have to wait until it goes back to normal.

 

[Aman Khatri]

might be some new feature in htc,search in display or lockscreen option.