WEM API 422 Error on Legal Hold Bulk Export

Can anyone explain why the Workforce Engagement Management API returns a 422 Unprocessable Entity when filtering for legal_hold=true? The endpoint POST /api/v2/wem/exports fails validation despite correct JSON structure.

Environment details:

  • Genesys Cloud v2.24.2
  • S3 destination bucket with proper IAM roles
  • Architect flow version 14

The metadata is visible in single recording queries but omitted during batch processing for discovery requests.