TV is UE48ju6500 4k curved
Soundbar is hw-j6001 curved 48"

I too use sound connect but also have an optical cable and when you change inputs on the soundbar, the sound connect input is delayed and the optical cable coming from the same skybox is fine.

There is no way to delay the picture only the sound.

I cannot seem to update the soundbar firmware, it will not load the file from the usb, this is might be because the latest firmware is already loaded. I have tried re-formatting the usb drive and different usb drives.