An on and off problem with my PowerBeats Pro ha recently gotten worse. When I take them out to wear, the left unit won’t sync, and it turns out it has run down its battery in the case: R is at 100% but L is at 0%. If I re-seat it and watch it like a hawk it will charge enough for me to use, but I’m guessing there’s a bad connection with the case or something because this often happens when I go to use them (several times a week when running). Is this a known issue and are there any fixes? I love these headphones for running and this is just so annoying.