The sound of my airpods is unbalanced

The left airpod emits a louder sound compared to the right one. I have checked for debris or any other physical obstructions inside the airpod and there seems to be none. I have also gone to the Audio/Visual section in settings and checked the balance between the two airpods and they seem to be in the middle, where they're supposed to be. This persists on both my Macbook and iPhone. This issue has occurred once before but it had resolved itself. Please help me out