How Do I Stop My Phone From Pocket Dialing, Etc.?

Except for break time, my iPhone stays in my pocket during my work shift. When I take it out at break time, I discover it has called my wife several times, or the flashlight is on, or I can’t unlock the phone (“try again in X minutes”), or something else that shouldn’t be.
Under the “Allow Access When Locked” section of Face ID settings, I’ve turned everything off. Yet it’s still doing all of the above almost daily. I’m pretty confident I’m not sticking my face into my pocket to unlock the phone, lol, so how is this happening, and how do I stop it from happening?
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Cameron