Setting vmware partial_graph discovery increases the efficiency that vmware publishes discovery data. Which will resolve the issue.
To setup partial graphs.
Go to the probe's Raw Configure dialog.
Add or find the key: discovery_server_version.
Click Add Key.
In the value field, enter the version for your Discovery Server.
For example: 8.2 or higher
Click Apply Changes.
Deactivate the robot
Delete the items in the vmware/discovery directory
Activate the robot.