For Vizio Users: Figured this out, I'm pretty irritated about it. Turned out to be the TV's fault.  Vizio put in a 'feature' in the firmware where each HDMI line can have the UHD (4K) turned off.  This wasn't an option when it was working correctly, so that's why it stopped working. The query response now makes sense why it was saying it could only support 1080 in the conditions/parameters.