The earliest recollection of this bug is traced back to PAN-OS 11.0.4 - November 18, 2024. This bug is fixed in PAN-OS versions 11.0.4. Fixed a memory leak issue where the packet buffer count continuously increased and the firewall required a restart to clear the buffers. For more information: https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-release-notes/pan-os-11-0-4-known-and-addressed-issues/pan-os-11-0-4-addressed-issues