catch

Hello all, I am back with another question! Law 17.1(a) states: To claim a mark, a player must: a)Have at least one foot on or behind their own 22-metre line when catching the ball or when landing having caught it in the air... Now, suppose that Red 15 jumps to catch the ball, catches it...

So, there was this maul which ended unsuccessfully and, I quite frankly don't understand totally AR's decision nor what he says. Why is it Toulouse's ball in the subsequent scrum? Not a direct catch? AR's unsure of who put the ball in the maul nor who had possesion so attacking team's ball?