This is a GREAT play to discuss in terms of positioning and play calling.
Since the introduction of the RA, I have had trouble with this play (as the new L and C) because I will look at the defender's location (feet). By the time the offensive player starts his shooting motion, I'm more likely to catch the last 1/3 of his shot.
In this case, I could understand why the L might have missed the initial contact by Tx-4's right arm on the Mi-10's shooting right arm.
Tx-4 started vertical and was retreating, however I feel his right arm moved out of his vertical plane and contacted Mi-10's forearm.