I just got out of the nether and started exploring heading towhere the sun was setting And then i camped out on a small island and slept.

What I expected to happen was...:
To wake up to peaceful minecraft day music!

What actually happened was...:
Nether Music started to play

Steps to Reproduce:
1. I was in the nether exploring for around 30 minutes
2. I came back to the overworld and decided to explore for shipwrecks.
3. It got late out and I went to sleep and then the nether music started to play