Weird. All I do is create a Mackie Control and set the MIDI ports - then it just works. And make sure the X-Touch is in Mackie Control mode, of course.
Maybe a screen shot of how you have it set up?
I can do that later sure.
What happens when I add it using Mackie Universal Control is I only get the option to use x-touch INT on the input but it’s no longer available on the output.
In Live 11 and Reaper I can use the x-touch INT on both in and out and it works fine.