I assume Mackie will fix this one with high priority. This is "system down" for people with only one docked iPad.
Fyi, it happened to me last night.
The docked iPad had been "resyncing" itself once in a while, and finally in the last ten minutes of the performance it permanently lost connection to the DL. The app was still operable, and the recording was uninterrupted, but the control surface connection was lost with apparently no way to revive it without undocking the iPad (and thus interrupting the recording) which I did not want to do.
Fortunately we had two other iPads connected via wifi, which we were using as our primary control surfaces, so no sweat on the docked iPad issues.
Which brings me to the question -- why bother with a docked iPad at all? Why? Because you have to dock an iPad if you want to record anything digitally from this board. Which brings me to the question of -- why not have a USB recording jack rather than the iPad recording? Hmmm ... that's the X32, isn't it?
I hope Mackie does something quickly here. Forcing you to waste an iPad just for recording purposes without the ability to reliably also use it as a control surface, adds another $300-400 (cost of the 2nd iPad) to the operational cost of this board.