Intermediary status remains "delivered" even after signer completes

Hi, I’m developing a contract signing workflow using DocuSign.

I’m facing an issue where an intermediary (recipientType: "intermediary") never transitions to the "completed" status, even after the signer they assigned completes signing.

### Flow overview:

1. An intermediary is set with `routingOrder: 2`.
2. The intermediary opens the envelope and assigns a signer.
3. The signer (routingOrder: 3) receives the envelope, signs it successfully.
4. However, the intermediary remains in `"delivered"` status instead of `"completed"`.
5. As a result, recipients with routingOrder 4 or later never receive the envelope.

### Notes:

- If the intermediary step is removed, the workflow completes as expected.
- `agent` role was also tested but did not fully resolve the issue.
- The signer assigned by the intermediary appears correctly in the recipients list and completes signing.

Is this expected behavior for intermediaries?  
How can we make the intermediary status transition to `"completed"` after the signer finishes?

Any help would be appreciated!