Data Action response mapping dropping nested JSON keys in Architect

Architect & Flows
1

The Invoke REST Data Action keeps returning a 200 but the variable mapping step silently strips out the nested data.user_id field. We’ve verified the raw response payload and it’s definitely coming back from our endpoint, yet Architect only populates the top-level status code. Here’s the mapping JSON I’m passing to the action:
“responseMapping”: {
“userId”: “$.data.user_id”,
“status”: “$.status”
}

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