The earliest recollection of this bug is traced back to PAN-OS 8.1 - July 22, 2025. This bug is fixed in PAN-OS versions 8.1.11. ( PA-7000 Series firewalls using PA-7000-20G-NPC cards only ) Fixed an intermittent issue where an out-of-memory (OOM) condition caused the dataplane or internal path monitoring to stop responding. ( PA-7000 Series firewalls using PA-7000-20G-NPC cards only ) There is an intermittent issue where an out-of-memory (OOM) condition causes the dataplane or internal path monitoring to stop responding. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-11-addressed-issues https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-release-information/known-issues/known-issues-related-to-pan-os-8-1-releases