If your earbuds are not disconnecting from your device when you place them back in the charging case this could be because they are not making the correct contact with the pins in the case. Please ensure that if you are using the largest size of ear tips they are not preventing the earbuds from sitting all the way down in the charging case and making contact with the pins. You should hear a 'click' when putting the earbuds back in the case as they snap into place.
To check that the earbuds have been placed back in the case correctly again when you have finished using them we recommend that you always check that the LED sequence is showing the breathing white LED pattern on the buds. This means that the earbuds are sitting properly in the case.
Please note: If the earbuds are not making correct contact with the pins in the charging case this will also prevent them from charging and could mean they have no charge when you come to use them again. This will result in the earbuds appearing 'dead' out of the case and will mean they will need to be successfully charged before they can be used again.