Accounts Receivable Paperless Office E-mail

We have Sage 100 2015 version 5.20.2.0.  We just updated from 2013 to 2015.  Invoices that are e-mailed with paperless office will have the incorrect customer name in the subject line.  When a batch is e-mailed it will have the first customer name in the subject line for all of the invoices.  The invoice itself is sent to the correct customer just the subject line is incorrect.  What can I do to fix this issue?  Thanks as always for your help!