Hi GlennP1,
Unfortunately switching back to V6 isn't an option, (well not an easy one).
Is your soundbar not working because you have bypassed it to cure the lip sync problems.
What TV and soundbar do you have, providing the make and model numbers may help getting an answer, also are you connecting the soundbar using a HDMI cable and eARC or fiber optic cable.
You need both boxes set to fast start or active start to watch recordings between boxes, are both boxes connected to the hub using ethernet cable or wifi and is the hub set to router or modem mode.
I see you have previously posted about pixelation problems before the update did you have an engineer out to adjust your signal levels or replace a box.