While biopics always have to sprinkle a bit of fiction into the mix for the sake of drama, comedy, and/or narrative cohesion, there is traditionally a strong intent to make everything in the movies as accurate as possible. When a work is based on a true story, that truth is expected to be honored, as honoring reality is a key part of what makes the subject interesting. That being said, mistakes are made occasionally, and a very funny and specific one has been discovered in the new film Springsteen: Deliver Me From Nowhere.
I don't think I'm stepping out of bounds by saying that the vast majority of people in the movie-going world don't know what kind of condiments Bruce Springsteen likes to put on his hot dogs... but there are also apparently people out there who are intimately aware of that bit of trivia, and it's leading them to point out a "mistake" in the new 2025 movie starring Jeremy Allen White as The Boss. There is a scene in the film where Springsteen expresses that he enjoys mustard when he is downing a frankfurter, but Twitter user GenZBruceFan has video evidence of that not being true:
