,Mario mash up pack is broken

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Steps to Reproduce:
1. (list every step carefully, so someone else can reproduce the issue)
2.
3.
Observed Results:
(briefly describe what you see happen, including any message(s) shown)
Expected Results:
(briefly describe what should happen)

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Steps to Reproduce:
1. make a new world with Mario mash up pack activated
2.make a nether portal
3.go in the portal
Observed Results:
instead of mario music, it plays rubedo instead
Expected Results:
last few updates it should have played mario music instead