Gigi Hadid & Joe Jonas Get Their Signals Crossed (PHOTO)

Gigi Hadid was not super interested in Travis Scott's performance -- or her boyfriend, Joe Jonas -- 'cause she was completely fixated on her phone during Rihanna's New York Fashion Week party.

Eventually Gigi did pay him a little attention, not that he heard much of whatever she was whispering. We'll just say ... Joe appeared to be a little "under the weather."

Young love.