Interesting. Who knows?!? It seems an easy thing to search for stuff on twitter or IG, however, enough accounts are set to private that you only get a sniff of possible sightings from responses and not directly from the sources.
I think that HI might be a place they could actually go 'undercover' and get away with it. We've only had a few pics of him since he got to HI, and only one was from a fan (the sneaky pic of him in shorts - and even that one took a month to surface). Everything else has been from people connected to the movie. And the number of non-pic sightings of him have been few.
So, if she were to show up, maybe it wouldn't make the airwaves.