Bro remember that there were 2 Lbw appeals in that over.
The first one MI didn't reviewed and later in replay they showed that the ball was hitting the stumps on umpires call
On 2nd Lbw appeal the umpire gave it out but later in replay it showed that it was missing leg stump(which vijay didn't reviewed)
Note :they showed the replay of 2nd Lbw appeal earlier than the first one. As those 2 Lbw appeals happened in quick time so even before showing the Replay of 1st one in which he was not out the 2nd Lbw replay came in which he was not out but given out by umpire.
For verification u can check the highlights or maybe the post match show in which the experts may discuss about it.
Everybody blunder in fielding especially Boult .. everybody feeling the desert temperature .. double header are the worst one seems especially for Foreign players