Platt said: "I don't think he is the first manager to go on to the pitch. He wears his heart on his sleeve."
He added: "Why wouldn't the manager of a football club be frustrated? Why wouldn't we all be frustrated?"
The Italian also appeared to lose his cool as a cameraman followed him onto the pitch at the final whistle.
"Robbie has gone onto the pitch and spoken to the referee. As he comes back, he turns around and has a camera in front of his face for 30 yards.
"He turns around and says, in English, that basically it is enough now.
"People then want to start talking about what has happened and almost exaggerating the incident." said Platt.