Other mistake: During the restaurant shoot out between Jr and the bad guys, he takes Sasha's weapon (Kel-Tec P-3AT) and opens fire on the bad guys. The Kel-Tec P-3AT is chambered in .380 and holds 6+1 rounds. During the firefight, Jr fires 9 times. We also see the bottom of a spent casing and it shows .22. (01:12:00 - 01:13:00)
Shaft (2019)
1 other mistake - chronological order
Directed by: Tim Story
Starring: Samuel L. Jackson, Regina Hall, Alexandra Shipp, Avan Jogia
Continuity mistake: Shaft Jr is in an FBI meeting, and the director asks for a volunteer for a mission. Shaft raises his right hand, next shot his left hand is raised. (00:10:05)
John Shaft Jr.: You can't beat up a woman.
John Shaft II: Why not?
John Shaft Jr.: Because she's a woman! That's like, misogynistic.
John Shaft II: You're the one being misogynistic, I never even mentioned her gender! I'm an equal-opportunity ass-whooper.
Trivia: Richard Roundtree is just six years older than Samuel L. Jackson, despite them playing father and son.