Awesome movie but whit a big mistake

Rating: 2/10 (22 April 2019)

Fantastic story and for me the best Spiderman movie ever. The only one thing is the huge mistake in the movie.
How is possible that Gwen Stacy came earlier to Miles Morales world before Peter Parker put his head in the dimension machine? Gwen suppose has to appear after that crash and not before, remember that Miles and Gwen met in the school before that scene.
Don't tell me you didn't she that?