"No items found" message when viewing galleries in the editor

Overview of the issue

The issue occurs with the WPML Media Translation plugin active.

When duplicating a post that contains a gallery added through a shortcode with listed image IDs, a “No items found” message is displayed in the translated post editor instead of a proper gallery preview.

The issue concerns only the preview in the editor – all images are correctly attached to the post, visible and correctly translated on the front-end.

Workaround

There are two workarounds in this case.

1. Use a simple {{gallery}} shortcode instead of the one with IDs listed, i.e. {{gallery ids="1, 2, 3"}}

Please note that in this case, gallery will display all images attached to a given post.

You can read more about WordPress Gallery shortcodes at http://codex.wordpress.org/Gallery_Shortcode.

2. Add the images manually to the translated post gallery.

To do this, use the following steps:

1. Click the Edit button in the gallery preview (the one with the pencil icon).
2. Choose the “Add to Gallery” tab.
3. Choose the “Media Library” tab.
4. Filter the listed images, choosing the “Uploaded to this post” option.
5. Select all the required images and click the “Add to gallery” button (at the bottom right).
6. Click the “Update gallery” button (at the bottom right).

All images should now be visible in the preview.