Custom music discs cutting off

I'm making a resource pack with custom music discs, but some of them cut off. How do I fix this?

This bug, in my opinion, sucks most of the fun out of custom music discs.

The audio file is 6 minutes long, but cuts off halfway through. If you're curious, the disc replaces Pigstep.

And apparently it also affects 5, which I replaced with "It's Just a Burning Memory".

 
This should be fixed with all of the discs.

Oddly, when the music discs cut off, allays and parrots keep dancing.

I have provided audio files. The sound always stops after two minutes and twenty-eight seconds. It also plays for that long. But the audio file is 6 minutes long. I installed the custom resource pack with DurangoFTP.