Matrix visualization row not showing expansion after data model update

We have a published report which contains a matrix visualization.  The rows control now contains three fields; when initially published it contained two.  The third row field is a calculated concatenation field which had not been created at initial publication.

Via the URL that end-users use, the first row expansion (displaying field two) works fine and has always worked.  Field two values show an expand/collapse icon, indicating that the report knows there is a third field to expose.  However, when the expand/collapse icon is clicked no new fields/rows are exposed even though the status of the expand/collapse icon changes.

I have refreshed the report and its associated semantic model.  I have cleared the browser cache.

In Power BI desktop everything works as designed.