Associating pre-created incident to request chat

Content

I am using Connect Web Services to pre-create an incident (say ID-1), and than associate it with a chat session.  The association is done through the Request Chat API call.  A number of operations are performed on the incidents, such as attaching file to it and updating its custom field values.  However, when the chat request is accepted, the update to the incident ID-1 is displaced or overridden.  If the chat request is not accepted, the update to the incident ID-1 remains intact.  I want the information to remain intact after the chat session is accepted.  I would appreciate any