Vexatos
Audio cables wired across chunk boundaries disconnect when the chunks reload
The cables reconnect and resume playing music when the disconnected half (left half in the above image) receives a block update.
I'm the owner of a small (5 people) multiplayer server, and up until now we had been solving this problem by simply chunkloading all the chunks with audios cables in them. As our base grew this became impractical. We're playing our own little custom pack on a rolling release, and AFAIK we're running the latest version of Computronics (1.12.2-1.6.6) but we haven't updated it in about a year. Since the problem resolves itself when block updated, I'm currently working around it with pistons next to the cables and RFTools wireless redstone.
