Putting a link to a radio station inside the radio or a CD will break the link when you start playing it and leave the server (also singleplayer world? Never tested in singleplayer). The chunks are forceloaded with FTB Chunks but the link will still break and will not work any more.

Reproduction steps:

• Login on server with mod
• play a radio station link from fmstream.org on the radio (or burn it on a disc and play via jukebox)
• leave server.
• rejoin server.
• music disc not working anymore when injecting the link (or the disc).