The earliest recollection of this bug is traced back to PAN-OS 11.1.10-h7 - November 17, 2025. This bug is fixed in PAN-OS versions 11.1.6-h21, 11.2.4-h14, 11.2.10, 11.1.10-h7. Fixed an issue on Panorama appliances and Log Collectors where, after an upgrade, Elasticsearch intermittently entered into a Red state before automatically recovering. Upon upgrade, the ElasticSearch health status intermittently transitions to the Red status for sometime, and then auto-recovers back to Green. During the Red status periods, the cluster logs are unavailable. This occurs due to disk write operations being excessively slow, failing to meet the minimum time threshold required to save the cluster state. For more information: https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-10-known-and-addressed-issues/pan-os-11-1-10-h7-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-6-known-and-addressed-issues/pan-os-11-1-6-h21-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-0-known-and-addressed-issues/pan-os-11-2-0-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-1-known-and-addressed-issues/pan-os-11-2-1-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-10-known-and-addressed-issues/pan-os-11-2-10-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-2-known-and-addressed-issues/pan-os-11-2-2-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-3-known-and-addressed-issues/pan-os-11-2-3-known-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-h14-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-known-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-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-6-known-and-addressed-issues/pan-os-11-2-6-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-7-known-and-addressed-issues/pan-os-11-2-7-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-8-known-and-addressed-issues/pan-os-11-2-8-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-9-known-and-addressed-issues/pan-os-11-2-9-known-issues