In the climax scene Sunny asks Ishaan to see him and instructs him to take a taxi. The taxi's registration number changes mid-journey.
The pattern of paint damage on Sunny's car is different when Suman sees it at the night of the crime and when she see it again outside Ishaan's house. Also the door handles are different.
When Sunny and his men go to Narotam Mehta's house it is raining heavily and clearly everyone is drenched after leaving the car. But in the next shot when they are knocking on the door everyone's clothes and hair are dry.
Ishaan's SUV's built, look and make keep changing throughout the movie.
After her dance performance Suman leaves in a taxi which hits Sunny's car. The car (taxi) that leaves the dance hall and the car (taxi) that hits Sunny's car are different.
Sunny forces Narotam Mehta to sign a document to sell his property. The document had green header which is a Non-Judicial Stamp paper. Such Non-Judicial Stamp papers are cannot be used for selling or transfer of property.
ACP Aslam Khan interrogates Ishaan several times but in real life such interrogations cannot take place without obtaining a warrant from court.
When Sunny shoots Narotam Mehta and his wife there are loud gun shots. But despite the loudness other family member don't hear the gun shots and remain asleep.
Mysteriously Suman, her mother and the taxi driver do not hear loud gunshots despite being in the vicinity of Narotam Mehta's house.
When Sunny and his men go to Narotam Mehta's house to force him to sell his property one of the men is not wearing mask. When Amrita comes out of her room she should have the seen his face as well. But during rest of the movie she does not mention anything about this man to police.
Jodha Bhai and Nahar Singh are rich, powerful and politically well-connected. It is highly likely that such business families do have good lawyers who could help them keep out of legal troubles. Despite this they don't provide any legal help to Ishaan when he gets in trouble with ACP Aslam Khan.