WFM Bulk User Import 500 Error via Terraform Provider

Looking for advice on WFM user provisioning failures during automated env promotion.

Running terraform apply with provider version 1.9.0. The genesyscloud_wfm_user resource fails with a 500 Internal Server Error when assigning skills.

Error: Error creating WFM User: POST /api/v2/wfm/users: 500 Internal Server Error
Response body: {"errors":[{"code":"INTERNAL_ERROR","message":"Failed to process bulk operation for skill assignments"}]}

Manual creation via UI works fine. Is this a known limitation with the current provider release?