Symptoms:

• No data is found in the "What" field 

OR

• Data from "Who" field is sometimes generated in "What" field

Pre 4.2.4:

After 4.2.4

Summary:

Starting in Team Calendars for Confluence version 4.2.4, there is a new field for the summary for the calendar event called "What". This field will generally take information available in the "Who" field and populate it there.

If there is no information is listed in the "Who" field, then nothing is populated in the "What" field. 

Cause:

Upgrading to Team Calendars for Confluence version 4.2.4 from an older version introduced a new field where some of the data can or will not be pulled to it.

In Team Calendars for Confluence version 4.2.4, we introduced some field name changes, and therefore this is actually working as intended. 

Workaround:

Fill out the information manually within the new field as needed.