I can absolutely confirm that, in my case, my GF's son has a Switch and as soon as he changed it to airplane mode, the Roku set up screen popped up. And since the dude is always on the **bleep** thing until 1am, explains why it wasn't working the other night. so frigging weird.
There was a update issued a few days ago that fixed the problem of the Nintendo Switch causing the Roku to freeze on the load screen. My Roku 3 downloaded the update automatically on Tuesday, 11-19 and I have had no problems since then. Anybody still having problems should check to see if they got the update.