This issue is resolved in ePO 5.9.1, which is available from the Product Downloads site at: https://www.mcafee.com/enterprise/en-us/downloads/my-products.html.

NOTE: You need a valid Grant Number for access. See KB56057 - How to download Enterprise product updates and documentation for more information about the Product Downloads site, and alternate locations for some products.

Updates are cumulative; Technical Support recommends that you install the latest one.