This is a known issue affecting VMware NSX for vSphere 6.4.1 and 6.4.2.
This issue is resolved in VMware NSX for vSphere 6.4.4, available at
VMware Downloads. .
Workaround:
To work around this issue, either do one of the following:
- Update the existing Security Group (SG) in the applied-to field to include other virtual machines/entities.
- Create a new SG in the common Grouping objects tab with required entities and use that new SG in the applied-to field of the recommended rule in ARM tab.