Why does my lock screen disappear?

[AC Question]

lock screen disappears

I woke up this morning and my lock screen was gone and it was back to the standard swipe to open my phone. thought it was so fluke so put the lock screen back on. Since then it has done it 3 more times. haven't had any updates in a month or two. Anyone know why it is doing this all of a suuden.

 

[B. Diddy]

Re: lock screen disappears

Welcome to Android Central! Which phone? Is Smart Lock turned on? https://support.google.com/nexus/answer/6093922?hl=en