I had that too from day one.
Finally got a new STB (after asking for one about 20 times and then gave up and tried to cancel service and THEN they replaced it like they should have the first time)
Didn't see the glitchy hiccups for months and now they are back. It used to be primarily on commercials and now its on TV shows too and I too have to stop watching them as it's entirely intolerable.
Not sure what to do now....I dont have the energy to go round in circles with VZ "Customer service" or "technical support"...it's exhausting when it literally takes HOURS every time and resolutions are hardly forthcoming.