I can’t ever remember seeing the KO return man catch the ball and casually flip it to the ref without downing it. If you’re right though, then why did this particular ref decide, on this play, to treat the flip from the return man like a live ball and refuse to catch it, notwithstanding that return men “do it all the time” without consequence? Did he just decide on the spot to screw the Texans?
To me—and under the rules—it’s no different than if a punt returner fielded a punt without signaling a fair catch and then flipped the ball to the ref without attempting to advance it. Clear fumble and a bonehead play by the return man.