WFM Schedule Publish Triggering Security Policy Violations

Just noticed that publishing the weekly WFM schedule triggers a 403 Forbidden error on the wfm:schedule:publish endpoint. This happens consistently at 17:00 CST. The service account has wfm:schedule:update permissions, yet the audit log flags it as a policy violation.

service_account:
 role: wfm_admin
 permissions:
 - wfm:schedule:update
 - wfm:schedule:view
environment: Chicago
version: v24.5.0

Any ideas?