After the CRM 2015 Online Maintenance Release of Update 1.2 (7.1.2.1025 to be exact), the email message body no longer shows for email activities in the Activity Feed for various entities. You have to click the email twice to get the message body to show. Before this maintenance release, the body/contents of the emails in the Activity Feed would automatically display on form load. This seems like a bug or configuration change.
BEFORE UPDATE 1.2
AFTER UPDATE 1.2






