Interesting, we don't have that problem with our Sony SS system. Do you have an option of plugging cables into different "sound-output jacks" on the back of your TV or changing to different "input jacks" on your SS processing unit? If so, you might try that.
Jim & SherrySeward
2000 Residency 3790 v10 w/tags 5 Star tune & Banks system Suzuki XL7 toad