Who I have the same questioned this topic

Every since the last update, my Kyocera duraforce Pro 2 ringer and notification volumes keep turning themselves off at random times during the day, and my home screen keeps freezing. 

I am a high-voltage lineman and have missed numerous call-outs because of this and have been disciplinedI am a high-voltage lineman.

I have tried soft resetting it to no avail.