Platform API 422 on nice_cxone_routing_skill_set skill_level array serialization in provider 1.20.1

Trying to push updated skill set mappings through the CXone provider without blowing out the manual overrides. The 03:30 JST sync pipeline choked on nice_cxone_routing_skill_set. Terraform 1.9.8 with nice-cxone 1.20.1 returns a 422 Unprocessable Entity. Endpoint hits /api/v2/routing/skill-sets/{id} and dumps a validation error on the skill_level array. State backup shows zero drift. Ran terraform refresh twice. Cleared the local cache. Provider logs show the request payload flattening the nested skill objects into a flat list before the POST. API docs say the array shouldn’t flatten. Console throws the same 422 when testing the payload manually, so it’s definitely a serialization bug. Checked the release notes for 1.20.1. Nothing mentions the change. Logs are doing jack all useful right now. Pipeline is sitting at step 4 waiting on a retry.