Have you checked to ensure the host which failed is actually sending logs to vRLI?
Yes the host itself is sending logs:
2018-07-12T14:24:15.828Z [redacted].domain Fdm: verbose fdm[8124B70] [Originator@6876 sub=FDM opID=SWI-77188b05] [FdmService] New event: EventEx=com.vmware.vc.HA.ConnectedToMaster vm= host=host-135 tag=host-135:204067005:0
The actual HA details are reported by vCenter it seems:
2018-07-12 14:01:15.023 [redacted]vcenter.domain vcenter-server: vSphere HA restarted virtual machine Server on host redacted in cluster Boston_Cluster
Just nothing in the dashboard
Did you ever find out what was going on? We're having the same issue. Figured you might have a solution before we go digging.