This game I saw a new tactic from Australian Batsmen against Imad , as they kept "faking" their shoulder before Imad or any Spinner (Hafeez) were about to throw their bow. It was almost like how boxers move their shoulders side/side
I think one of the reason why the ball slipped from Hafeez's hand is due to the shoulder flicker move, which is why Hafeez to adjust his bowling last minute so it slipped from his hand
The small flicker caused the bowler to change their delivery
I don't think any other team does that , at times it looked like they will charge out to hit the ball but they did not it was just a fake shoulder gesture
However Shadab was still bowling his own style was quite successful 4 wickets