Music discs can be taken out of Jukeboxes with Hopper Minecarts, but not Hoppers

can confirm

Working as intended. Jukeboxes now emit a redstone signal while they are playing a disc, and they stop emitting the signal as soon as the disc ends. This redstone signal blocks the hopper from taking the disc before the song has ended. Hopper minecarts can only be disabled/enabled by activator rails, so they are unaffected by the redstone signal from the jukebox.

I suggest reverting the redstone output.  We can already get output via comparator and boost the signal with a repeater.

That actually makes sense that it emits redstone, I forgot about that, it was just weird.