Random Lock Screen, even when in use???

[kwhopson]

Why does my Android 10 Galaxy S9 keep going to lock screen randomly, even while I'm actively using it, like when I'm typing in a any like this? In the Settings I've got the Display time out set to 10 min and Lock Automatically is set for 30 min except when Smart Lock (No Body, Trusted Places) keeps it open.

 

[puppykickr]

Does it happen when you cover the top of the screen?

There are apps that do this when the proximity sensor is covered.

 

[kwhopson]

Does it happen when you cover the top of the screen?

There are apps that do this when the proximity sensor is covered.

I don't ever cover the top of the screen. To do that, even by accident, would mean I was holding the phone in a way I wouldn't ever hold it. I'm using the same Otterbox cover that I've been using for over a year.

This only began a week ago. It happens completely randomly, a few times an hour at least. It has happened while actively pressing app controls, or reading, or just ended a call.

 

[puppykickr]

Bad battery, possibly?
The phone is old, and the problem is recent.

 

[kwhopson]

Found the answer on a Reddit post. Settings | Developers Options | Lock screen when trust is lost. < Disabling seems to have fixed the glitch

 

[puppykickr]

How did it get turned on in the first place?

And why is 'trust lost' occuring so frequently?