Hmm. What is that? I didn’t see it in your list above, and it doesn’t appear to be in the distribution.
This likely is the same issue as the Sony binding. Given that Home Connect uses state options, and that the squeezebox favorites started working immediately after you disabled Home Connect, I’m assuming its implementation of getStateDescription is broken. We need to get the Home Connect developer to fix the binding.
If interested, you can read more about the issue here.
