Chest sound glitched/messed up when near a mob sound.

When I was testing the new hopper block I placed a chest next to the hopper. (I was making a chicken farm with lots of chickens.) When I opened the chest it only plays the open and close sound for a millisecond. This also happens without the hopper connected to it but when I go far away from the chicken sounds the chest sounds went back to normal. Im not sure if this applies to all mob sounds.