Sure radios? He was told to wait. He did not wait. Team car then came up beside him and told him again to wait. By this time Sartre was in no more danger and Most of the stage had played.
It was a huge tactical error on the DS's part and the radio was not plugged in when Pawels was told to wait the first time. He was told from the window of a car when he obeyed.
Van Poppel might have gotten nervous and made a panic call.
By the way... This reminds of a story from the Tour de France in 1990 which always is told on Norwegian television during the TdF. Atle Kvålsvoll, Hushovd's coach, was on team Z with Greg LeMond. On stage 17, Kvålsvoll and a team mate were in a break, looking good for a stage win. Then LeMond punctured on a descent in the peloton, the result being that his two team mates had to stop riding, so they could help LeMond back to the peloton.