Seemingly after the Q4 2017 release, previewing emails with dynamic content isn't the same sharp process as it used to be. When testing an email with several dynamic elements, I used to be able to plug in a sample email from a target list and the Marketo preview would show me exactly how the email would display.
Now, emails aren't changing in preview mode. I can only be sure that dynamic content is triggering properly when I send a sample test email.
Has anyone had this issue recently?