Sending email from acrobat via outlook keeps the email open after sending

1) We open the pdf in acrobat (fully licensed) - and click the send as email attachment button which opens a blank email in outlook with the pdf as the attachment 

2) We finalize the email and click send - outlook sends the email correctly

3) After sending the email it pops up a new blank email with the attachment again - this is what we do not want

how do i fix it so that outlook only creates one email, and doesn't pop up the second