Palo Alto Networks - Defect ID: PAN-149641
Fixed an issue where firewalls stopped refreshing IP tag information when configured with the VM Information Sources feature with a VMWare vCenter Server.

The earliest recollection of this bug is traced back to PAN-OS 8.1.19 - January 09, 2024. This bug is fixed in PAN-OS versions 8.1.19, 9.1.7. Fixed an issue where firewalls stopped refreshing IP tag information when configured with the VM Information Sources feature with a VMWare vCenter Server. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-19-addressed-issues https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-7-addressed-issues