so i went down the rabbit hole and-
after going through the files from the demo, and replaying that scene in game..
you are correct that that
exact picture (town_bj3) is
not in the game. the scene progresses from 'town_bj2' to 'town_bj4'.
from what i can tell, it looks like most of sanas roaming scenes have 4 variations; however that specific bj scene has 5 files associated with it.
its always possible it could appear in game in the future, but if i had to guess, i would say headpat probably removed that specific bj image (town_bj3) from the roaming sequence to match the others at 4, cut down the total images to allow players to progress roaming more quickly, while reducing any redundancy from very similar images running back to back.
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so.. pretty much this: