Just finished the game. It was an overall AWESOME adventure! Really loved the story, most of the game design choices, and the whole experience. Really happy I played this!
And I experienced another important bug: 
When Natalia finishes telling her story, (with the flashbacks) and the scene moves back to the present time, the cutscene just gets stuck, completely. (And I couldn't progress any further.)
I used my RPG Maker MV to get around these two bugs for myself, so I was able to reach the ending regardless.
(P.S, Nadine's my ABSOLUTE favorite from the whole cast! Absolutely love her character, development, & dialogues.)