When you enter the query "Network Map" in VCF Operations for Networks, you receive an alert "Last updated 6 hr ago". Below is an example screen shot:
NOTE: VCF Operations for Networks was formerly named Aria Operations for Networks (AON), and prior to that was named vRealize Network Insight (vRNI).
VCF Operations for Networks Versions prior to VCF 9.1
These symptoms are the result of a known issue that is scheduled to be fixed in release VCF 9.1.
To workaround this, reduce the scope of the Network Map, referring to the documentation at Network Map Scope
If this is an insufficient workaround for you until the code change scheduled for VCF Operations for Networks 9.1, please open a support case with the VCF Operations for Networks team using the instructions at Creating and managing Broadcom support request (SR) cases