It might be that preview images are cached. However, it is frustrating to click an image and it must be retrieved but it is not possible to retrieve it. So, please only show images which can be painted.
If online, the gallery shows all images.
If offline, the gallery shows only the cached images.
It might be that preview images are cached. However, it is frustrating to click an image and it must be retrieved but it is not possible to retrieve it. So, please only show images which can be painted.