My phone removes its screen lock setting by itself

[Android Question]

My phone is kind of weird that it will reset its security setting at random time.

It happened a couple times that I set the face screen lock, and at the beginning it works pretty fine.

For a couple days ago or some day, my phone removed its face screen lock setting from my phone by itself.

When I go to check the security setting the screen lock turned back to "none" from "face lock".


I was considering I have switch sim card with other phone and sometime will put my phone into developer mode for testing my app.

Would those cause my phone to reset its security settings?
It bothered me six months X(!!!!



Thank you very much!!!

 

[quickaudi]

i WOULD SAY THAT ANY TESTING OF AN APP THAT YOU MIGHT BE DOING COULD POSSIBLY RESET SOME SECURITY SETTINGS, YES.