Hello!
We've just opened a show with a large amount of pixel mapping. From hours of troubleshooting our pixel maps, it appears that in my map with channels as the pixels, only the Part 1's will respond, while anything in a higher part won't react (they're both patched just as dimmers). My workaround was to add an address pixel over the top of my channel pixel that contained the next part, but it seems like this is a bug.
Thanks!