I had it happen only when a major update has been downloaded to the iPad.
The last minor update a few weeks back never asked for a firmware update on the mixer.
I downloaded the update on both iPads and have connected them each to my mixer with neither one asking for an firmware update.
I also use my iPad on someone else's mixer almost every week and while it will ask me to import the
settings from my iPad, it has yet to ask me for any type of firmware update and I know the owner has not done the latest update.
I just cross my fingers and hope for the best
I would do the firmware update when the mixer asks for it 🔊