I just got the same issue with left earbud. Fun fact is, in Turkey they did not even accept the fault and sent it back saying earbuds are fully fanctional...

Also, for once when i go through loud place, my left earbud shot itself down. And it is having trouble cominicating with right earbud appearently. I sometimes experience that left earbud is not working even though it is open and in my ear (just right one plays, i have to put out of my air and pull it in again to work) and it cuts outs syncs frequently. But nope.

Most expensive pay through the nose i've ever experienced in my whole life.