drag&dropping file to a label-filtered Attachments macro does not add the label to file

When using an Attachment macro and restricting this macro with a label on it to show only the attachments with the associated label, Confluence fails to update the label on the attachment being inserted.

notes: This behaviour only happens if the user attempts to drag&drop the attachment.
In case the "browse for files" button is used, the attachment is updated with the correlated label.

Steps to repro

• Create an attachment macro;
• Put a label on this macro;
• Drag and drop an attachment on this macro

Expected behaviour

The attachment will be listed in the macro along with any other attachment.
Which means that the macro label will be applied on the attachment

Actual behaviour

The attachment is uploaded just fine to the page, but does not display on the macro because it lacks the required label.