Setup a workflow for a Custom Module using SuiteCRM Version 7.7.8 and when action triggered with Email, the History Panel does not show the Sent Email. It does show if the Contacts or Account Module is setup as the Workflow Module, but does not work for the Custom Module to show Sent Email in the History Subpanel.
PS: I have added the following Fix for related Notes
https://github.com/salesagility/SuiteCRM/issues/1561