EventBridge rule not firing for Genesys conversation events

My EventBridge rule isn’t triggering for genesyscloud.conversation.update events. The pattern looks solid, but nothing hits the target Lambda. Here’s the JSON pattern I’m using:

{
 "source": ["genesyscloud"],
 "detail-type": ["Conversation Event"],
 "detail": {
 "type": ["conversation.update"]
 }
}

I’ve checked the CloudWatch logs for the rule and it shows zero matches. Is there a specific field I’m missing in the detail object?