Hello. So since I got my AirPods I noticed that my right airpod doesn't stay 100% while in case and drains to 75% instead. My left one doesn't have a problem and is always 100% when not in use and in the charging case. I used it all day couple of days ago to drain the battery hoping it will get fix, both got fully charged to 100%. now when I was planning to use it i opened the case, it says that left is 100% again but right AirPod is 75%. Is this broken? Why does the right AirPod doesn't stay 100% while in the case and drains? :/