Disclaimer

Known affected versions were inferred from fixed-version data and were not explicitly confirmed by the vendor: 8.1.4-h2

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 8.1.5. Fixed an issue where a failed commit or commit validation followed by a non-user-committed event (such as an FQDN refresh, an external dynamic list refresh, or an antivirus update) resulted in an unexpected change to the configuration that caused the firewall to drop traffic. There is a rare issue where a failed commit or commit validation followed by a non-user-committed event (such as an FQDN refresh, an external dynamic list refresh, or an antivirus update) results in an unexpected change to the configuration that causes the firewall to drop traffic. Workaround: Perform a successful commit immediately after you experience this issue. Alternatively, reload an earlier successfully-committed configuration and manually refresh the FQDN list. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-5-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