It does not happen live and I don't have over the air. It's PBS British produced programing, Masterpiece in particular, it started when I chose to recorded in the middle of the night..as opposed to primetime...?
No such thing as a dumb question, but no add ons/dongles on anything, I have a Mac airport/time capsule that routes. I do use wireless but not to any TV or receiver equipment.
It Turned out to be... I think, "Film Mode" with the 2014 Sharp AQUOS Quattron+ (Q+) TV.
I clicked from Advance to off, the issue seems to have be eliminated.