HiddeMoens Having same issue, hadn’t noticed it until a recent trip. Almost never look at the app, while on the plane I noticed that having them just taken out of the charging case the Left was at 90% and Right at 100%.
Look at the case and the pins were not at the same height. One of the pins was almost flush with the plastic. Pulled it with a pair of tweezers, charging now. Don’t know it this is just a QC issue