Continuity mistake: When they catch the tall bad guy in the police parking lot, Glass kicks the bumper and that makes the airbag pop out, shouldn't the airbag start deflating immediately after?
Plot hole: When they are investigating the small box that was pulled out of the trunk of the car, the one with the doll, shouldn't they be wearing more protection? They are only wearing protection for their legs.
Continuity mistake: Right at the beginning Glass says he has a count down, he says it's 1m42s but the clock says it's 1m46s.
Continuity mistake: When Nettles questions the girl the second time, right before he leaves he grabs her hands. We get a shot from the front and her hair is behind her ear. The shot changes to one from the side and her hair is loose, then again to the front and it's behind her ear again without her touching it.
Continuity mistake: At the end when Nettles finds the bomb in City hall's basement and he is being told what to do by Glass, Glass tells him to feel the right side and he feels the left.