The earliest recollection of this bug is traced back to PAN-OS 10.2.14 - July 22, 2025. This bug is fixed in PAN-OS versions 10.2.14, 11.1.4-h1, 11.1.5, 11.2.5, 11.2.4-h6. ( Firewalls in active/passive HA configurations only ) Fixed an issue where firewalls entered a non-functional state and displayed the error message Dataplane down: path monitor failure during the fail-over . For more information: https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-14-known-and-addressed-issues/pan-os-10-2-14-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-4-known-and-addressed-issues/pan-os-11-1-4-h1-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-5-known-and-addressed-issues/pan-os-11-1-5-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-4-known-and-addressed-issues/pan-os-11-2-4-h6-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-5-known-and-addressed-issues/pan-os-11-2-5-addressed-issues