A couple of minor issues I found:
When powering on the Duo, the Display Brightness value is set to a default instead of the last selected value.
Also, it seems that the left knob (at least), has become very sensitive while in the settings menu. It is easy to jump pass the setting you want while turning the knob. It also makes it more difficult to push the knob to save a setting without the cursor jumping to another setting without saving the one you wanted to modify.
My last one is more of an annoyance… Is it possible to ask the plugin developpers to add a description of what their effect/pedal is for? It is not easy to know which pedal to select when three of them are named “Mixer” and none have a description … I find this primarily in the “Beta” plugins.