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Thumbnails are not created for subfolders.
"mass importing" files from sites/default/files/images make the images available for "handling" (inserting, editing deleting etc) by Drupal/Media module.
But thumbnails are not created for these files when browsing them as an editor. The images work in every other respect. Once inserted they show up fine in any media style. Also clicking on them to edit them in the content:files tab works brilliantly.
As a test I moved one of the images to sites/default/files and reimported and the thumbnail appears like expected.
The location of the file is known to Media, but the if the file is outside the "default" public files location of admin/config/media/file-system the thumbnail isn't rendered. Is there a way around this?