Hi Kris,
I'd say "that's impossible" but you've already seen it, so it's obviously not impossible. Unfortunately, all of this stuff related to hardware is hard to test (technical reasons)...
Anyway: currently we don't send back to the same place the MIDI is inputted from. We're considering this for the next release. Our fear was MIDI loops... still need to evaluate on how Thru will work. We might need another button called, "echo"
Thanks!