When you click on the number/hyperlink next to the "Out-of-Date" client on Endpoint Protection Manager (SEPM) Home Page, the count does not match in the drilldown report.
The issue is primarily seen if there are macOS clients in the environment
SEPM 14.3 RU10 (Refresh), Build: 14.3.27665.10000
Known Issue
The fix for this issue will be included in next release of SEPM.
Please contact Broadcom Technical Support for a workaround.