Yes, the consensus seems to be the problem is with the Surround Sound output. Turning it off fixes the problem for me on all my TV's. But that's not an acceptable solution - I specifically went with Fibe TV (vs the cheaper Fibe App) because I want 4K...
Interesting. I don't have a streamer, but my Fire TV only shows Standard/Good/Better/Best under the Streaming Quality. It does, however, now have a Surround Sound option. My Apple TV in the other room has Standard/Good/Better/Best streaming options, ...
Trouble with the OTT Bell Fibe app is that there's no 4K and no Surround Sound...stereo only. If Bell don't fix these issues too soon then I'll be cancelling my service though.
Just got the VIP7802 too, and having this same issue. Terrible support from Bell. This box seems to have a lot of problems. Agree with your points OP, I'm not turning off Dolby Vision on my TV, thereby disabling it for all sources, when it's only Bel...