Motorola Droid Turbo :: Why Does Ring Volume Lock On Silent

Verizon XT1254 Moto Droid Turbo, android version 5.1.About once a week I notice that my phone is on silent ringer, I might catch a call because I feel the vibe, or see a missed call. I check where the ring volume is and the slider is all the way to the left on silent. Pushing the vol up hardware key does nothing, touch and slide the slider and it will snap back to silent as soon as you lift your finger. I do have moto assist set to silence the phone from 11pm to 730am, but this problem seems to happen during the day, not just stuck from the nightly mute and the moto assist notification is not up on the screen. If I require the phone to ring at night, there is no problem just moving the slider and moto assist does not interfere.

I have checked through settings, tried multiple ways to raise the volume but nothing works. The only fix is to turn off the phone and then back on again. BTW, what happened to the quick menu that was under the lock button with a long hold that would allow volume changes, vibe on or off, airplane mode and restart? My Gzone has all that under a long press of the lock button.