Why am I having volume control issues when Melomania 1+ are connected to an Android device?

What to do when the volume is only increasing in the right bud and only decreasing in the left bud:

Step 1. Enable ‘Developer Options’ on your Android device.

Step 2. Ensure ‘Disable absolute volume’ is toggled OFF.

Step 3. Place both buds into charging case.

Step 4. Remove buds from charging case, they will then connect to your device.