The earliest recollection of this bug is traced back to PAN-OS 10.2.4 - November 18, 2024. This bug is fixed in PAN-OS versions 10.2.4, 11.0.2. ( PA-5440, PA-5430, PA-5420, and PA-5410 firewalls only ) Fixed an issue where firewalls in active/active HA configurations experienced packet drop when running asymmetric traffic. For more information: https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-4-known-and-addressed-issues/pan-os-10-2-4-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-release-notes/pan-os-11-0-2-known-and-addressed-issues/pan-os-11-0-2-addressed-issues