Passing the time with pocket watch shouldn't change her position, unless morning comes, morning should reset her to the front of the store. But I ned to do a bit more testing there. I think there are a few work arounds I could add to remove the bug.
Not sure if this helps, but for me the bug fixed itself the day after she was randomly awake at night.Edit: it appears it has broken again after making the star charts
Thank you, I will note this down :)