In the beginning Jonah is credited but at the end Jonah is not credited.
In the middle of the movie the shapeshifter is sitting on a couch in the daylight then it cuts to Ellie at nighttime.
Almost near the end of the movie the camera almost falls off of a table.
Almost at the end Ellie and Noah see online that a place called the starcourt mall was destroyed in 1985. and it is not explained.