It was just bad refeering. Nothing more, nothing less. Just like, us, frenchies, we like to believe we're contantly fucked over by referees in european games, because, really, what's the difference between an englsih and a welsh if not for more readed hair ? That's called a confirmation bias.
They should never have appointed a romanian ref for this game. And everyhing would have set down. Now, it gets traction in french and british press. I don't believe WR will go full retard on this one (like asking for replaying the game), but some people will need to go down at Rugby Europe.