When using the apps sometimes the thumbnails in an album will all disappear and you are left with just grey boxes.
One way I've done it is, to filter photos via a tag. Open image with media viewer, then open three dot menu and then edit exif. Back out of exif editor and then the thumbnails will disappear. Swipe down to refresh does not fix it. Leaving the album and returning does.
When using the apps sometimes the thumbnails in an album will all disappear and you are left with just grey boxes.
One way I've done it is, to filter photos via a tag. Open image with media viewer, then open three dot menu and then edit exif. Back out of exif editor and then the thumbnails will disappear. Swipe down to refresh does not fix it. Leaving the album and returning does.