No dialogue on programs recorded by DVR watched on PC or on TV

I have had two programs recorded on my DVR this week that have no voices/dialogue when watched. Tried on my TV directly from the cable box and streaming on my PC.

Both shows are on the CW (Arrow and Supernatural). On the Arrow Facebook page I saw a number of people in South Florida (where I live) complaining about the same problem. I thought it might be a one time glitch but happened again two nights later with Supernatural.

How do I fix this and keep it from happening in the future?