After the bugfixer disappeared, it is possible to see this scene by going to one of the teleporters, after having activated it.
By the way, it isn't possible to know that you have to delete the persistent file before seeing this scene (unless you saw it on the internet).
I can understand that it is difficult, I am currently working on a guide.
Problem solved.
These steps:
1. Open game, choose Yes. You have to start the game before the 2nd Yes (if not, Mary keep asking about Santa)
2. Save after change MC name
3. Close game and make Mary hide inside the church
4. Open game and sell something to get money for pick lock
5. Wait until Zanika go to toilet, peek her and get caught
6. Talk to Mary until the "leave me alone" appear (god i'm scare of this step)
7. Talk to bug fix girl until she close the church ( the fixed :) )
8. Active teleporter until meet Mary ghost, keep talking until end and save game
9. Open game, choose delete file and press delete persistent file (don't try to find the persistent file in your phone to save time)
10. Load game and go to church then talk to Mary.
Done.
