We have been using the CLM API - GET Document with Params expand = AttributeGroups] and it has returned successful result with the information/response coming in the JSON properly. 

The endpoint used was like this - https://apiuatna11.springcm.com/v2/{accountId}/documents/{documentId}?expand=AttributeGroups

All of a sudden from last 2-3 days ie, since Monday(May 12th) of this week - it has broken. We reviewed the Documentation and it does not provide info about any updates ? 

Has anyone seen this type of behaviour ? thx