[Escalated to WPML Developers team] WPML pugins & wp_delete_attachment do not delete files on disk

Hello,

I'm using the following plugins:
- WPML Sitepress
- WPML all import
- WPALLIMPORT

I discover that the wordpress function "wp_delete_attachment" do not works correctly when WPML is active. It looks like WPML apply a filter on "wp_delete_file" and do not allow the wordpress function "wp_delete_attachment" to delete files on disk. The function removes correctly the media in the wordpress media library but DO NOT DELETE files on disk. I have thousands of orphan files and many gigabytes lost on the disk.

To be more precise, if I use this function to send media files to trash ""wp_delete_attachment( $file->ID, false );"" and I empty the trash after, files are correctly delete from the file system. BUT, if I ask to delete files immediately like "wp_delete_attachment( $file->ID, true );", files remains on the disk.

The same behavior occurs when I setup WPALLIMPORT to delete files.

I'm wondering how to fix this behavior.
It would be nice if WPML could fix that in a future release.
WPML shouldn't change the behavior of a native wordpress function when it is called thru a plugin or the file functions.php in the child theme .

I'll send the link of this ticket for information to WPALLIMPORT author.

Thank you for your help.
Dimitri