Missing field in Alert automation


I've setup a time based alert to go out to a number of contacts based on several different Contact type cells. The alert has been configured to include many cells in the alert email, as well as using a few Placeholders in the message itself.

Most of this works as expected. However, there is 1 field that is not showing up in the list of fields. It is a multi-Contact field. It is the right most field in the sheet (in case that has any bearing). I have other multi-contact fields selected to include in the alert that are showing up just fine.

Any ideas of why this one field would not show up in the alert email?

Here is the trigger and conditions:

Here is the alert with the field in question highlighted:

Here is the column description for the field in question:

Thank you for your help.