I’ll have to try this as I seem to have the exact same setup / problems as you. Hdmi, always have to switch between the different hdmi channels to get it to work, new firmware just stopped it working at all. And it’s plugged into an extension cable and not directly into wall.

Yep same here, they’ve essentially bricked the dock

Yep after update my dock can no longer connect to the TV I’ve been using it on