I have recently purchased the Philips805 and Sonos Arc. The TV apps work perfectly with the TV and sound bar, I am getting Atmos DD+ which is great on Netflix. 5.1 and other formats also all work perfectly whilst watching the streaming apps. Now here is where the problem starts. When watching TV via my V6 Box I get lip sync issues with all 2.1 and 5.1 TV shows/films etc. Stereo works perfectly fine and last night I surprised to see I had no issues when watching BT Ultimate, which gave me Atmos DD+.
The only way around is to connect the optical cable to the from the V6 Box to the Arc. This way fixes all the lip sync issues with 2.1 and 5.1, but I then lose all sound on the TV apps such as Netflix, Prime etc and also lose Atmos DD+ on BT Ultimate. I don't mind changing the cables in the Sonos Arc short term, but I want a long term fix. I brought the Arc to keep things simple and clean, I love the sound but not the faff it is causing. I never experienced these problems on my previous set up.