Thanks all for comments and thoughts. My partner put in a tech support request, and the problem was narrowed down to an ethernet connection via wireless router, a question that another poster asked. Steve removed the router connection and the problem went away. My thought is that, even though the network was private with only the GLD and an iPad connected, somehow something MIDI’ish was coming in over the ethernet link. Not sure if MIDI over Ethernet can be turned off, but suggested that to my partner as something to try in order to maintain the ability to control things with either the laptop or iPad.
Thanks again, and perhaps this thread will help someone else.
Geep