According to the manufacturer's instructions, I would try this:
Poor or distorted sound:
Test different sources if available.
Make sure your TV can play surround sound.
sound. For more information, refer to the TV's operating instructions.
TV for more information.
If sound is being played from another device, lower the volume of that device.
the volume of that device.
Adjust the bass level using the Bose Music app.
Turn off the TV speakers. For more information, refer to the
TV owner's guide for more information.
Perform the ADAPTiQ audio calibration.
Here is the link to the instructions:
https://assets.bose.com/content...
Or try contacting support at Bose