Never seen before

[Scrapper1]

Tonight, I was LJ1 and saw a play that I have honestly never seen before at any level. The ball is being played on my side of the court. The ball is passed to the setter, the ball is set to a back-row hitter who is just behind the 3 meter line, more or less right in front of me. The hitter attacks the ball.

So far, nothing unusual.

However, as the back-row player is attacking the ball, the front-row player in front of him is jumping to FAKE the attack. When the back-row player contacts the ball, the ball then glances off the forearm of the faking front-row player.

There is no whistle from the R1 and no signal from the R2. The R1 is a great official. To make matters worse, it was match point. (It was 25-10, so it didn't affect the game, but still.) We talked about it after the match. R1 had moved his eyes to the other side of the net, and the R2 was focused on the blocking action at the net. I only saw it because both players were in my direct line of sight for the whole play.

Is there ANY way that I can or should indicate this fault to one of the referees? I'm 99% sure that the answer is no, but I feel like this is important enough to warrant as much as input as the referees can get.