I was able to show all icons in a folder by creating a custom css file. I created a file named expand-folders.docker.css in /boot/config/plugins/folder.view2/styles containing the following: .folder-preview {
height: auto;
}
I just experienced the same issue. All folders are suddenly gone. Luckily I at least have a screenshot that is semi recent to know what my folders looked like but I will still have to manually recreate all of them. Very frustrating.