Bangladesh lost their sixth wicket for107 as skipper Shakib Al Hasan was controversially handed a leg before afterwards the dismissal of Soumya Sarkar.
Shakib went down the wicket and tried to flick one against Shadab Khan, The ball hit Shakib's leg even as he came down more than three metres. The umpire, after a long look, raised his finger but Shakib immediately took a review.
Even as the replays showed that Shakib had a tiny edge on to the bat before the ball hit his pads, the on-field umpire's decision was stayed.
Subsequently the Bangladesh skipper, spoke to the umpires twice before heading to the dressing room.
It all came after Bangladesh had made a ideal start, reaching 70 for the loss of Liton Das in their winner-takes-all encounter of the T20 World Cup against Pakistan in Adelaide on Sunday.
Bangladesh decided to bat first with three changes. One of those incomers, Soumya Sarkar, was called into action early as man-in-form Liton fell cheaply.
In the second wicket stand Najmul and Soumya added 52 run to overcome the early loss.
The winners of this game will qualify for the semifinals.