[NAME]  This could be an issue with Cache, Could you please clear the browser cache and update the browser version as well and let us know if you still experiencing this issue with devices lost. Thanks, Anil Kumar V K R #I Work 4 Dell.
I updated Openmanage Enterprise to 3.6.1 and after the reboot the Devices = 0.  Is there a way to recover them or does this require discovery again?
update openmanage 3.6.1.6