After the new update I headed to the signal where Greenbriar radio signal came from, and switched off the HAM Radio, but the radio signal continued. It was working fine before the update (I was encumbered after looting the place so I reloaded, and promptly forgot about the place until I passed by yesterday). I haven't tested this with the other signals, but it may be a global thing.

Sorry if this has been reported, but I couldn't find the main thread for patch bug feedback...