Hello, I’ve noticed for the past few months ever since I’ve owned the sleepbuds that there is a high frequency buzz in the left earbud. It only happens when sounds are playing through the sleepbuds, and it sounds like feedback or something. The only sound I feel like I can listen to that masks the feedback noise is the rain and it has to be pretty loud, so i feel like I’m not using the sleepbuds to their full potential. Is this a known problem? To other people experience this? Its impossible to ignore now that I’ve heard it.