Reader DC attachments problem

When I open a pdf/a3-a file with attachements the attachements are shown above the head pdf.

The paperclip is not shown in the sidebar so I could only view the attachment list above the head pdf. When opening one of them I could not get back to the orignal head PDF.

Are there just missing some settings. Because now it's not really workable I have to open every pdf file again after opening a attachement.