It happened to me a couple times yesterday when I was walking around. Apparently, I kept coming into contact with traces of a previous quest, that would automatically turn off your radio so you can pay attention to the event occurring near you. Basically to give you a heads up. But despite the fact that the quest in question was already accomplished, the radio will still correspond to it and turn off and then back on automatically. Sometimes in very erratic patterns depending on where i move about.
It also sometimes happens around specific outdoor food sellers, even if you do not stop at their hut. This is the first time I experienced it after 300+ hours in. It was happening specifically in Japantown for me. Just one play-through. After i played again later in the day, I no longer experienced it. So i'm guessing its a small bug.
