EventBridge pattern matching for conversation events

How should I properly to debug an EventBridge rule that isn’t firing for conversation.update events?

  1. Deployed rule via Pulumi TS with source: 'genesys.cloud' and detail-type: 'ConversationUpdate'.
  2. Injected test event via aws.events.put_events().
  3. Rule remains inactive despite logs showing the event was received by EventBridge.

Pattern below. Am I missing a namespace qualifier?

{
 "source": ["genesys.cloud"],
 "detail-type": ["ConversationUpdate"],
 "detail": {
 "eventSource": ["conversations"]
 }
}