No Music While Surfing

I do not know if this exists in the 1.1.6 update as i have not yet determined how to update, but in version 1.1.5 when i surf with the instant lapras, i do not hear any music. There is also no music for encountering wild pokemon while surfing. And occasionally the lack of music carries over when i go back onto land.

P.S. It is quite unsettling to not hear music, i was somewhat frightened when I first encountered this bug.