Review of Steven Universe: The Movie

Dont get me wrong, the movie is good especially with all those singing and the action going on but the plot is not good, i mean the protagonist Steven loses their closest gem memory while a villain which is Spinel goes to kill everyone, but after that everyone loses memory, and to get the memory, he have to do everything the gems just said their past to him while the injector is like killing the planet, but after that everything went back to normal so quickly after everyone regained their memory, like how the liquid from injector dissapears, like the entire liquid destroys all the living things, i know its a movie but it just doesn't make sense