This alert will be visible on the cluster until the resolution provided below is completed.
At cluster level, the vSphere UI shows a similar Issue, "vSphere HA failover operation in progress in cluster Cluster-1 in datacenter SDDC-Datacenter: 0 VMs being restarted, 2 VMs waiting for a retry, 0 VMs waiting for resources, 0 inaccessible vSAN VMs." at the cluster level.
Reconfiguring vSphere HA for the cluster will clear the alert. Please create a Support Request with VMC GS (Creating and managing Broadcom support cases) with the request to clear the alert.
Note: There is no downtime when reconfiguring vSphere HA at the cluster level.