A slight delay is common for Bluetooth headphones due to the limitation of Bluetooth technology. In most cases, the delay is minimal and should not impact your experience. It's worth noting that it can be influenced by various factors like the device, audio source, app, and network conditions.

To fix this issue, please try the following:

1. Forget the earbuds in your device's Bluetooth history and reboot your Bluetooth device.

2. Fully charge your earbuds and reset them by following these steps:

- Place the earbuds into the charging case and leave the case open.

- Press and hold the touch bar on the charging case for 5 seconds. A function menu will appear on the case's display. Slide to select Reset, then double-tap to confirm. After the reset is completed, a "Reset Successful" prompt will appear along with a single-tone chime, which will fade after 2 seconds. This confirms a successful reset.

3. Test your earbuds with a different Bluetooth device, app, and downloaded music/videos to see if the issue persists.

4. Turn off Dual Connections in the soundcore app.

Ensure the Bluetooth device and earbuds are within the Bluetooth range and free from signal interference.

If you have any more issues or your issue has not been resolved, please contact us for further assistance.