Even with the sound and music buttons turned off in the settings menu, when you open a pack you still hear sound.
In the previous update I had the same error the way I solved it was using headphones. I restarted it and put it in, tried it, was still making, restarted and put it out, tried it and no more sound.
That is so weird! 
But I’m guessing that might be the bug - it’s using “headphones” channels for the packs opening instead of the primary sound channels or something along those lines.
Bumping just because it’s still a problem in 1.31.
Was going to post this one, but will just add on here. My OS also is playing the sounds odd so when it does the pack opening it sounds pretty bad and is super annoying if I’m listening to a podcast at the same time.
Not only is it the only place that makes noise it is extremely loud and very annoying.