Well the IceTV Plex solution (not the raw XMLTV service) seems to have fixed the problem. Its rather disappointing to see that i need to subscribe to a 3rd party service to make this work though as the Gracenote guides were virtually unusable due to the lack of information for certain channels. I would have hoped there would have been a way to still play the channels in Plex without the guide information like you can in the HDHomerun app itself as well, maybe something for the future.
I am still trying to figure out what the “Loading” channels are about, but it doesnt appear to be breaking anything for the time being.