Still in 1.11.2 - Snow golems will attack creepers, and in return, creepers will target the snow golems.
Also happens on v1.11.2.
Cannot reproduce anymore.
Happens in my worlds too. Turning music to 0% wont stop it and if I let it at 1-100% it will sometimes play 2 tracks at a time.
EDIT: Sometimes launches w/ no music. Thanks for the F3 + T tip though!
Updated to note it still happens on 0.15.10
Happens to me too (1.11.2)