The abnormally high number of times England's Ben Stokes overstepped the crease while bowling on the second day of the Ashes Test created quite a controversy, but the tourists' bowling coach, Jon Lewis, blamed the on-field umpires for not pointing it out to the all-rounder when he bowled his first ball.
On-field umpires did not get help from the technology that helps check the front foot on every delivery. It was reported that the equipment that does this had broken down and Stokes went on to bowl a total of 14 no-balls, with only one getting detected.
With help from technology unavailable, the one delivery of Stokes that was called no-ball was because the TV umpire checked it after David Warner, batting on 17 at that time, got bowled on that ball.