The earliest recollection of this bug is traced back to PAN-OS 10.1.8 - February 19, 2025.
This bug is fixed in PAN-OS versions 10.2.2, 10.1.8.
Fixed a memory leak that occurred when enabling XFF (x-forwarded-for) logging in a Security policy.
For more information:
https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-release-notes/pan-os-10-1-8-known-and-addressed-issues/pan-os-10-1-8-addressed-issues
https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-2-known-and-addressed-issues/pan-os-10-2-2-addressed-issues