Architect Flow Deployment 400 - Queue Timeout Settings

I can’t seem to figure out why the 400 Bad Request occurs during flow deployment.

Provider v1.68.4, Region au-1.

HCL validates locally. The API rejects the queue_timeout block in the routing strategy.

resource "genesyscloud_flow" "ivr" {
 routing {
 queue {
 timeout_seconds = 60
 }
 }
}

Error response indicates invalid JSON structure for the timeout field. Is this field deprecated or required to be nested differently in the current API version?