I worked on multi-million dollar airplanes. If a pilot called me with an issue and hadn't rebooted the plane (on the ground), I wouldn't even talk to them. Rebooting isn't always a bad solution to technology.
(on the ground) is probably pretty key, though. Ha ha. I can imagine the conversation if this was in the air.
It's not a bad solution, it definitely should be tried. But I'm still rather shocked to see it in official notes, especially this "late" in the timeline.