I am using Instant-On mode with a new Halo 5 console but it does not shutdown correctly. I can turn it off with the Kinect command or the controller but after shutdown the LED on the power brick turns amber instead of remaining white. It will not respond to 'Xbox On' and it will not turn on with the controller. Only pressing the console power button works.
Energy-Saving mode works correctly - it does respond to the controller to turn on.
I have tried with a different power brick, different power outlet, unplugging all peripherals (hard drives, USB TV adapter, Kinect sensor) but the same thing happens.
I have removed the power for several minutes and tried a factory reset. I have tried different controllers (they have been paired and do work when the console is on).
I am in the NXOE preview program but I removed this new console and it reverted to the old dashboard. The same issue still occurs.
Is this likely a hardware issue?