As I already said before, the game isn't designed around changing sizes whenever you want via Debug Mode. This feature exist for a different purpose and some of the scenes might not work correctly as they have unique assets which depends from a correct size being set that is available through just playing the game and unlocking sizes as it was intended.
Beach scene on Aida's arc will work only on size 3.
Shopping scene and Kanagawa arc will work only on size 4.