I'm having the same issue as of October 5, 2018. HD channels that are playing HD content are coming in as really odd widescreen and have the black bars on the top and bottom of the screen. I have not changed any of the picture/zoom settings on my TV or my STB.
What is the issue that is happening with these boxes? Also, what is the reboot code for DVRs? I'd like to at least apply temporary solutions until Verizon gives a more permanent fix. I don't want to unplug and replug my DVR and I was almost sure there was some way to input special codes into the DVR for certain actions like reboot.