Photo Gallery Forums

If there are many folders in the home directory, I pull down to open a folder below to browse, which is when the page jumps to the top when I return to the home directory, and when I want to go back to the home directory, the page stays where it is currently browsed

Yes, because this is how all file browsers work. Besides, attempting to scroll back to the position that the user was previously on is buggy, because the layout shifts when images are loaded.