Other mistake: The van used by Cecilia to chase Tom should be damaged because of the crash, but it was not.
Other mistake: When Gary is about to test the trap check the bus door on the right: there's a reflection of what seems to be his shirt, but it's a long sleeved wrinkled shirt, not the short sleeved he's wearing. What's even more bizarre: when Gary moves around, the reflection stays completely still and, drumroll, a shot later, from the very same angle, the reflection disappears. Either it was a crew member hiding, or a CGI-made reflection placed to hide some unwanted crew or equipment reflection.
Other mistake: When the protagonist is making the exchange via the BMW and tries to slip the Algorithm into the passing car (himself), the window of the car is up, so there's no way he could have thrown it in. (01:19:55 - 01:33:55)
Other mistake: In the credits of the movie, the creator of the original comic's name is misspelled as "Bob Macleod" when it should read "Bob McLeod."
Other mistake: At the end, when Bill and Ted reunite with their wives, one of them mentioned hearing Ted say something about distributing instruments to everyone throughout all time. However, Ted said this a minute or 2 before they arrived. We even see the phonebooth they are in land after the statement was made. Therefore, there was no way for his wife to hear him say that.
Other mistake: In the frame you can see the girl is playing on a newer Macbook, she is using a wired headset but the headset is not plugged into the laptop, you can also see she is using a wired gaming mouse, and the USB cable is just sitting there not connected to anything. The Macbook is USB-C only and the mouse is USB-A.
Other mistake: When Mara and Dylan are placed in isolation, there does not appear to be a plastic barrier between their beds (but one is visible a little later). Mara and Dylan's index fingers look like they are almost touching when Mara says "ET" and Dylan replies "Elliott", but the next view - from the front of both - their hands look about a foot or so apart and the plastic barrier is in place. (00:36:14 - 00:37:33)
Other mistake: I don't think enough is known about the mating and birth habits of Great White Sharks to label this a factual or character mistake. Emma said, "Sharks return here each year to feed, mate, and give birth." I don't think sharks mate and give birth in the same location plus females give birth every 2-3 years. After mating (in deep water away from humans), the male and female go their separate ways and the female apparently gives birth close to the coast (shallow water) for the pups' protection. (00:03:36)
Other mistake: When the kid first leaves and enters the house, he takes out the crossbow with an arrow in it but the elastic drawstring is flapping around in front. (00:22:33)
Other mistake: Isaac was able to break through his wrist restraints (taped to arms of a chair), escape two androids, quickly find and escape with Sara (while other androids started pursuing) - during a "full security lockdown" in a facility previously unknown to him. Isaac would not know the building's layout or where doors - and an exit - would be, but he had little problem getting out during lockdown while numerous people and androids were chasing him.
Other mistake: The time freeze dome extends well beyond the little Italian square and covers the surrounding buildings as well. Everybody and everything is paralyzed/suspended, but a gramophone in a window looking directly at the square continues to play. (00:34:03)