Bundled photo-app only shows previews from folders, not full image

Since the upgrade to nc 28 (i think) the bundled photo-app does not show photos in folders in full size anymore - just their small previews. The link is displayed in the browser but on click nothing happens (open in new tab offers download).
On the overview-pages it works (click displays larg(er) image. Since the pictures are organized in folders it would be nice to be able to view them that way - not the arbitrary mixture from the “overview.”
Is there any way to get the former behavior? I#ve checked all users’ and admin-settings and could not find anything.
(It works that way in the files app, but i’d prefer the photo app if it respects my order.)
THX for your input.