What's happening in Yuja with replace strings?

Yuja Panorama strips out the {firstname} replace string in course announcements IF some sort of edit or Yuja-suggested guided remediation of the announcement was performed/applied and updated to the announcement in the Yuja Accessibility Report area. Just opening it in the Yuja Accessibility Report won't do it. But if you elect to fix something in the announcement and then save that, updating the announcement, the {firstname} replace string is gone and it's "Greetings Yuja" to all users in the course.

What happening with instructors?

When the instructor creates the announcement with a replace string ({FirstName}), it works nicely.  When Yuja 'views' the announcement, the replace string is replaced for the current user 'Yuja'.  This doesn't show up unless you are looking at the remediation panel, or the alternative formats.  If the instructor has Yuja apply fixes to the announcement, then the replace string would be replaced by 'Yuja'.  The instructor would need to edit the announcement and ensure 'Yuja' is once again '{FirstName}'.

Example:

The screenshot below shows the error that will happen AFTER an edit is made through the YuJa tool, if the text includes a replace string: