In the toilet scene between Ranbhir and Sonam, the cigarette in Ranbhir's mouth suddenly goes missing.
When Ranbhir bangs his head in jail, he bleeds in just one place, but in the next hospital scene he has many scars.
Sanju is shown to be in a rehabilitation center in the USA, but the location shown is clearly Cape Town, South Africa. When Sanju escapes the rehab center and goes to purchase illicit drugs at a dockyard, a boat in the background has a call-sign for the South African port city.
The graying hair on top of Kamli's head changes pattern a few times.
Winnie and Kamli head to the jail to listen to Sanju's radio show in a Mercedes E Class. That face-lifted model of the E Class was launched in India well after Sanjay Dutt got released from jail.
The second-generation face-lifted Subaru Impreza WRX Sedan parked outside Kamli's New York apartment wasn't available in the US until late 2005.
The LG Monitor shown at Kamli's New York apartment wasn't available in the 1990s.
At first, Winnie decides not to write Sanju's biography because he's being called a terrorist. But when Sanju narrates his life up to the end of his drug addiction (way before the gun-possession era), she finally decides to write it. She didn't want to write initially because he was the accused terrorist, not a drug addict.