External file drop result with empty data

[GuillaumeGascon]

Describe the bug
I've created a dndDropzone with [dndAllowExternal]="true", but when i drop an external file, event.dataTransfer.files is empty. (It work on Firefox)

To Reproduce
Just create a section with the directive dndDropzone and [dndAllowExternal]="true", (dndDrop) event will result to empty event.dataTransfer.files.

Expected behavior
Get file list

Desktop (please complete the following information):

• OS: Ubuntu 22.04
• Browser: Opera, Chrome, Chromium (Working on Firefox)