Since the elevator incident, many don't look at Beyonce/Jay Z relationship the same way. Everyone is trying to read their actions and it tells on them.They are no more acting all loved up like they used to.
She also seems to have ditched Julius, her favourite bodyguard of over 5 years after reports that they were having an affair and Jay Z was jealous of their closeness (Here)..He is the same one who witnessed the elevator fight.