I have applied the firmware update and I’m still seeing the lost hub issue.

It also appears that the code set for this receiver is not displaying all of the options, so please look into that too.

Yes, I understand how activities work. This is impossible if the underlying device doesn't have programmed functions to send the signals for the source input buttons, which it doesn't for my receiver. The fact that it does for your receiver doesn't change that.

Ok, I just double checked - the physical Denon remote doesn't even have an INPUT button, and pressing it on the sofabaton does nothing.

My only choices in the key list are POWER, OK, CH-, MENU, NAVIGATE_UP, NAVIGATE_DOWN, NAVIGATE_LEFT, NAVIGATE_RIGHT, VOL-, MUTE, INPUT, BACK, REWIND, PLAY, FAST_FORWARD, STOP, PAUSE, RED, GREEN, BLUE, YELLOW, Home, VOL+, 1, 2, 3, 4, INFO, and CHANNEL. Possibly INPUT could be used to cycle the inputs, but that's not how I use the remote, which has individual buttons for each input source.

I’m aware of that. None of the input source buttons are listed there.