The earliest recollection of this bug is traced back to PAN-OS 8.1.9 - January 09, 2024. This bug is fixed in PAN-OS versions 9.1.8, 8.1.9. Fixed an issue where a process ( all_pktproc ) stopped responding when SSH decryption was enabled, which caused the dataplane to restart. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-9-addressed-issues https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-8-addressed-issues