Hello, thank you for reaching out to Microsoft Q&A.
May I please confirm whether you are experiencing the same issue with all of your Bluetooth audio devices?
Try disconnecting your Bluetooth sound bar, then reconnect it.
If you are still experiencing issues, first run the Bluetooth Troubleshooter in System Settings.
Start > Settings > System > Troubleshoot > Other troubleshooters > Bluetooth > Run.
Once completed, restart your Pc and pair your Bluetooth sound bar.
Please set it as the default audio output device.
If you are still having trouble, remove your soundbar from the Bluetooth settings.
- Open the Device Manager.
- Expand the arrow next to Bluetooth.
- Right-click your default Bluetooth driver (Realtek or Intel), select Uninstall device, then select the 'attempt to remove the driver software for this device' check box, and then click Uninstall.
- Once uninstalled, restart your computer.
- Go to Bluetooth settings > Add a device > Connect your Bluetooth Soundbar.
- Once connected, set as the default audio output device and see if it is working.