DateField Calendar resolution in Table/TableFieldFactory

I am having a problem using a DateField in a TableFieldFactory. The field displays fine in the table with the Calendar selector when I specify RESOLUTION_DAY. However, when I specify RESOLUTION_HOUR or RESOLUTION_MIN, the Calendar selector does not appear; only the text field. Is there something special about using the DateField in a table or within a TableFieldFactory? Are these resolutions not supported there? I am using the latest 6.8.5.