When talking to Marcus on the hospital roof, Mike has handgun put between the trousers and his waistline exactly behind his back, but in the next cut the gun is shifted to the right.
When Judy enters Gatorville with the marshals she is seen wearing two piercings in her left ear. During the confrontation with Armando in her next scene the piercings are missing.
When Marcus overpowers the robber in the convenience store, he grabs the robber's gun at the barrel. In the next scene he holds the robber by his wrist.
When Callie is helping Armando out of the building. As they exit the door, his left arm is wedged between them. When the camera cuts behind them, it is over her shoulder.
When McGrath frames the banker's lover for the "murder suicide" at the beginning, the bullet holes and blood spatter from when the bodyguard got shot would not fit the narrative at all.
Lockwood identifies himself at the wedding reception as "merely" a US Attorney; at the end, he is identified in a news report as a District Attorney. These are two different jobs serving different jurisdictions.
In any normal situation after a person suffers a heart attack, a patient would be connected to an IV so that the doctor could easily inject fluids and/or medication into their bloodstream. Marcus is not and is easily able to disconnect himself.
Will Smith calls out to Martin Lawrence as "Mike" when following him to the hospital elevator, even though Lawrence's character is actually "Marcus." Will Smith actually tries to say Marcus, he couldn't finish the whole name. In fact you can hear him saying Marc as in Marcus.
At 1:10:34 Mike said "We got the guy that had Captain Howard killed".
While Armando pulled the actual trigger, he was doing so at the direction of McGrath, as is revealed in the first prison scene.
When Marcus is on the hospital roof in nothing but a gown, the sign on the adjacent building says that it's a Grand Hyatt hotel. Miami doesn't have a Grand Hyatt, but the one shown is in Atlanta, a sign that most of the movie was filmed there.
The villains are based in a disused theme park called Gatorville. Ludwig says it closed in 2017 as a closeup of its Wikipedia page is shown. The page says the park closed in 2018 but also that it had an albino alligator as its main attraction between 2005 and 2019.
At about 42 minutes into the movie Smith is talking to some other detectives in an office. When the shot shows the back of his head, the shaved hair on the back of his neck is lopsided -- someone didn't give him a proper cut.
The movie's finale is set in Islamorada in the Florida Keys, as shown on the nav screen of the helicopter that flew there. The aerial shots of the vast, hilly forests it supposedly contains are obvious fakes: most of Islamorada is less than 1,000 feet wide, and like the rest of Florida, it contains zero natural hills.
It makes no sense for McGrath to work for the cartels after they tortured him. If anything, he should want revenge on them.