At 35:31, Sam is shot in the arm, just above the elbow, about 3 inches below the writing on her bowling jacket. At 41:42 when she goes to the doctor, the bullet hole is now on her shoulder, well within the writing on her jacket and above it.
When young Sam and Scarlet let go of the milkshake glass they were just drinking from, a blood stain from Scarlet's hand-wound is shown on the glass. However, the bloody part of the hand was never on the glass.
The panda phone Virgil calls Sam on was the phone used by the four men that kidnapped Emily earlier. So they shouldn't have that phone number.
During the library shootout, Sam and Scarlet use the main library desk as cover for bullets. You can see them behind this cover as the bullets strike and its a plain wood panel lining on their side.
In a later scene during the shoot out, you see behind this desk again but now it has shelves, books and random items vs. the bare wood paneling from the earlier scene.
In a later scene during the shoot out, you see behind this desk again but now it has shelves, books and random items vs. the bare wood paneling from the earlier scene.
In the film's beginning when Scarlet and Sam are having a milkshake, the orientation of Sam's hand on the glass changes from one cut to the other.
The thugs shoot Sam's car multiple times but the windshields remain completely clean. Even if they are bullet-proof, the hits should leave some marks.
As Wolfman and Frankenstein thugs with the money suitcase are blown up by a hand grenade, all that is flying in air instead of the supposed money and bearer bonds, is triangular napkins.
When Sam tells Emily to put the car in reverse, Emily moves the gear selector back toward drive instead of up toward reverse.
When Virgil is jumping out of the diner window he is parallel to the ground and Florence's arms are at his level. Yet when she shoots him the bullets go straight through his back.
Approximately 55:36 (on Netflix) into the movie Sam says to Emily "Hard left". Since the car is in reverse and Emily just gotten a quick instruction on how to turn, it's pretty much safe to say it's a goof since she turns the steering wheel to the right.
In the final diner battle, right after the guy's head hits the milkshake, you see two other goons writhing as if shot BEFORE the blood squibs explodes. In normal speed these likely wouldn't be noticed but since they show this scene in slow motion then it is more obvious.
Sam's arms are paralyzed but she is still able to pull the trigger on the gun when fighting the Boneheads.
It might not be a plot hole but in the final diner battle, the audience mainly sees the three main female characters fighting. However the main server, who takes the weapons when you enter, also has a weapon as does a 5th woman in a server's uniform at the end of the counter. There was nothing up to this point to imply that they would be involved at all. And after the battle, there is nothing mentioned about what the resolution would be for them afterwards.