You can restart your Beoplay E8 3rd Gen by placing both earbuds in the charging case and then charging the case using the USB-C cable.
After a few seconds, remove the earbuds from the charging case, touch the right earbud to switch them on and then start playback.
If restarting does not resolve the issue you are experiencing, you may need to re-establish the connection between the earbuds, following the steps here to do so.
