Yes, unfortunately I've seen this issue before. I made the first town you entered in the 4th movie very quickly and it's very buggy. The Poké Center connected by a bridge has a door where I forgot to change the transfer player script. So instead of warping to the proper Center and you end up entering one that you were in a few movies ago. Fortunately I've corrected this for the next beta (Although I don't really want to upload a patch in between Beta 3 and Beta 4 fixing this one bug.) . I never really explored how to correct this glitch. What I suggest doing is talking to the man in green and see if you can make your way back ( you might have to replay Movie 3).
I'm very sorry for this inconvenience and reply if you're able to make it back.