Dunno... but my friends don’t want me to intervene (not that I could) because they fear their visas could get yanked too. Will learn more next when they’re here I guess.
It’s an odd situation. I would think it would be unusual for a visa to be denied after an “approval”. I hate to ask, but is it possible she was “less than forthcoming” about some detail and they found out? Do you know what rule she was denied under?