Well after ordering a set of premium high speed HDMI cables and fitting them today in an effort to avoid some of the issues I have been having its still not fixed.
The new cables have helped, the 'info' button on the E6V remote will now display source and resolution info for signals via the sound bar.
When playing 4k HDR atmos stuff through the Xbox > SJ9 > TV it works most of the time, however, if I am playing a film then drop back into the Xbox home page then sometimes it drops the signal and other times it does show up but won't then re-play the movie or let me launch another app, say Netflix without re-booting all three devices.
It won't do 3D pass through (tried my old 3D Blu-ray) and I bought this in an effort to simplify the amount of kit I was using - plus all the extra reboots means it's not wife friendly at all so that's another non-starter.
On top of that its really damn slow to pick up on the signal from both Xbox and the testing I did with my old Blu-ray player, it constantly dumps into ARC mode despite me wanting it in HDMI in (in the process losing the ARC return too). I have also had it playing a 4k disc whilst outputting a 1080p signal to the TV - the Xbox was sending 4k as you can pull up the encoding info etc on the Blu-Ray player.
So its going back as despite it sounding good it really doesn't work as a sound bar unless you are sending it an Atmos signal or Bluetooth audio - which it's pretty good at.
Also worth noting then when I mounted it as per the instruction (100mm below the bottom of the TV) it sounded much better then when I had just placed it on the unit below the TV - worth using the provided template.
Anyone got any recommendations for an Atmos sound bar that supports 3D pass through and works without having to constantly recycle power?