DC's Ricky Ponting, Sourav Ganguly argue with 4th umpire after confusion over Impact Sub

DC head coach Ricky Ponting and director of cricket Sourav Ganguly argued with fourth umpire after confusion over Impact Sub during DC's innings against RR. They apparently argued on whether RR can field five overseas players after Rovman Powell was brought in as substitute fielder for Shubham Dubey. However, RR technically fielded only four overseas players at the given time.