For your reference, here are the reasons about music continuing to play:
1. If the charging case is powered off due to low battery, it cannot communicate with the earbuds, so the earbuds continue to play music as if they are still connected to the phone;
2. If the earbuds are not fully placed in the charging case, the sensing mechanism inside the earbuds will not detect that they have been placed in the case. As a result, the earbuds remain connected and continue to play music;
3. If the Bluetooth connection of the earbuds is not disconnected properly, the earbuds will continue to be connected to the phone, causing the music to continue playing. Normally, the earbuds will automatically disconnect the Bluetooth connection when they are placed in the charging case, but if there is a problem with this process, the music will not be paused.