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BugZero updated this defect 288 days ago.
The earliest recollection of this bug is traced back to PAN-OS 8.1.8 - January 09, 2024. This bug is fixed in PAN-OS versions 8.1.8. Fixed an issue where the Allow matching usernames without domain ( Device User Identification User-ID Agent Setup Cache ) configuration did not respond without a domain when you used the PAN-OS XML API. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-8-addressed-issues