I have a lightning:datatable correctly showing records from my class, and I have a row level action for each of the rows - all functioning correctly if there is more than a single result in the query.  If there is only a single record from the query, then the row level action box is not displayed in an action-able window.  A scroll bar appears - but the action cannot be accessed.  Any thoughts?

Screenshot of the action with multiple rows:


Screenshot with 2 rows:


Screenshot with a single row:


Thanks in advance!