Continuity mistake: After the car makes a U-turn, Callie's arm is not resting on the seat. A shot later, it is. (00:05:51)
Continuity mistake: While chasing the dragon, the car makes a left turn, and skid marks from previous takes are visible on the road. (00:06:24)
Continuity mistake: Callie holds the laundry basket with both hands, but an immediate cut later she is just holding it with one. (00:12:35)
Continuity mistake: When the possessor moves the tricycle down the street to the Ghostbusters HQs, the doors get blown off the entrance, and the Ghostbusters log/sign falls to the ground (seemed like a soft landing, in that it didn't seem to shatter... but when the long shot of the ice/frost proceeding to the firehouse (Ghostbusters HQ) is shown, the fallen signage is nowhere to be seen. (01:29:38 - 01:32:11)
Continuity mistake: Inside Nadeem's secret room, Lucky touches the horns on the wall with her left hand. In the immediate wide angle, she's using her right hand instead.
Continuity mistake: When Manhattan is freezing, Phoebe and Callie are in the car and Phoebe's glasses rest on the lower end of her nose, close to the tip. A shot later, they've moved upwards.
Continuity mistake: When Trevor and Lucky go up to the rooftop before the final battle, they lean over and rest their hands on the middle of a tile. From the opposite angle, they're resting on the section dividing two tiles.
Continuity mistake: When Manhattan freezes, the group meets at the HQ and Janine raises her right arm towards her chest and throat. An instant cut later, it's now her left arm raised instead.
Continuity mistake: While chasing the dragon, a laser beam destroys a Brooklyn Bridge road sign, and the car drives past it. An immediate aerial angle shows the sign on the road, but the car is suddenly metres behind, driving towards it.
Continuity mistake: During the first bust of the dragon ghost, there's a tissue paper on the dashboard of the police car that disappears between shots.
Continuity mistake: When Trevor sticks his finger out of the leaking hole, there's black mould stuck to it, which disappears a shot later.
Continuity mistake: When the dragon ghost flies by the police car, one of them is suddenly holding up a plastic cup between instant cuts.
Continuity mistake: When the movie begins, the Ectomobile drives by Cole Haan and continues to speed through Manhattan. When the manhole flies upwards, the car is suddenly next to Cole Haan again. This also happens with other locations that the car drives by twice.
Continuity mistake: The name tag on Podcast's uniform is always hand-written. When he puts on the scarf to start the final battle, it still is hand-written. When he shows up to smash the cables box, it's now a black and red sewn name, just like the rest of the Ghostbusters' uniforms. According to Ghostbusters Fandom there's a deleted scene where Ray gives Podcast an official name patch. (https://ghostbusters.fandom.com/wiki/Ghostbusters:_Frozen_Empire_Deleted_Scenes#google_vignette).
Continuity mistake: When Manhattan starts to freeze, the car speeds through the streets with Callie and Phoebe in the copilot's seat. In the close-ups, one can see that the place is empty. In some shots, there's a shadow of a bulky object, maybe a dummy of some sort or the driver, but it's definitely not the two actors.
Deliberate mistake: When Phoebe is about to destroy the lion statue, police cars arrive at the scene. Barely a second and a half later, suddenly the place is filled with cops who have managed to park the cars, step out, take positions, and aim. It speeds up the action of the film, but it's very awkward.
Continuity mistake: When Stantz finds the trash bag on the lion statue, the tip of the bag and the knot hang way over the edge of the base. An instant cut later, they are several centimetres behind.
Continuity mistake: When Venkman interviews Nadeem, the position of the pens in the glass swaps between aligned and messed up.
Continuity mistake: When Venkman questions Nadeem, he says "Hypothetical" and raises a pen. From the immediate angle from behind, it's lowered.
Continuity mistake: When Nadeem is being interviewed, the strap on the left (our right) is behind his ear in the front shots, or placed in front of the ear in the angles shot from behind.
