It's important to note that there may be a slight delay when using Bluetooth headphones, which is a common limitation of Bluetooth technology. In most cases, this delay is minimal and should not impact your experience. However, it's worth mentioning that the delay can be influenced by various factors such as the Bluetooth headphones themselves, the connected device, the audio source, the specific application being used, and even the network conditions.

To fix this issue, please try the following:

1. "Forget" the earbuds in your device's Bluetooth history. Reboot your Bluetooth device such as your phone or computer.

2.  Make sure the charging case has enough power and reset the earbuds by following the steps below:

  * Open the charging case and take out the earbuds.

  * Press and hold the touch areas of both earbuds simultaneously for 10 seconds.

3. Test your earbuds with a different Bluetooth device, or app and download music/video to see if the problem persists.

4. Turn off the Dual Connection.

5. Make sure the Bluetooth device and earbuds are within Bluetooth range, and there is no signal interference between them.