The earliest recollection of this bug is traced back to PAN-OS 8.1.17 - January 09, 2024. This bug is fixed in PAN-OS versions 9.1.6, 8.1.17. Fixed an issue where an HA configuration went out of sync when the HA sync job was queued and processed during an ongoing content installation job on the passive firewall. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-17-addressed-issues https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-6-addressed-issues