Under investigation. Condition affects eDP version 10.1.1 and higher.
A simple workaround is to click on the attachments icon (paperclip) in the lower right corner and select the attachments individually.
(For documents with multiple attachments use the Related Items pane 'scroll bar' on the right side of the pane to scroll down and select attachments.)
This issue is currently being considered by Veritas Technologies LLC to be addressed in the next major revision of the product. There are no plans to address this issue by way of a patch or hotfix in the current or previous versions of the software at the present time. Please note that Veritas Technologies LLC reserves the right to remove any fix from the targeted release if it does not pass quality assurance tests or introduces new risks to overall code stability. Veritas’ plans are subject to change, and any action taken by you based on the above information or your reliance upon the above information is made at your own risk.