Adobe eSign Agreements V6 API signingUrls returns delegator url instead of delegated

Hi,
I've got an issue with getting assigned/delegated participant url in adobe eSign
Endpoint I'm using is: 
https://api.eu2.adobesign.com/api/rest/v6/agreements/{externalId}/signingUrls

Steps to reproduce:
1) Upload agreement

2) Assing participants (1role-Signer, 2role-Delegate-to-signer) both are the same email address so same signatorie can assign other user to sign/witness

3) Once 1st signed and delegated participant to sign,  Calling  GET /agreements/{agreementId}/members returns collection with  new email/signatorie  status: Waiting for my signature. All other members show statuses: Waiting for others

4) Now calling https://api.eu2.adobesign.com/api/rest/v6/agreements/{externalId}/signingUrls  returns URL which was is used to delegate user (email in response matches 2role-Delegate-to-signer memeber)  instead of assigned user to sign the document.

Am I missing something or it is the issue with API?  I'm doing this on dev/sandbox environment