I agree. At the very least it will disrupt the concentration of the taker, even if the discord stops at the time of the kick.I agree that it's surprising, but looking at how Poch is quoted in the OMT, he hadn't sorted it out. With Kane out, he leaves it to the players to decide depending who is confident at the time (as I suggested was the case in that thread!)
I think this is a mistake and Poch should clearly identify the order of penalty takers before the game to stop just this sort of kerfuffle taking place during games.