Best way to report/file a SR for OIC (for Demo instance only)

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What are the options in order to report/file a SR for an OIC instance (specifically for Demo instance only)? I've already created a ticket in jira (https://jira.oraclecorp.com/jira/browse/ICSWC-27997), however its already been more than 1 week, and I have not gotten any response. To summarize the issue that I am reporting, we are experiencing an error upon mapping to a sub-integration call. Here is the thread for it - https://cloudcustomerconnect.oracle.com/posts/f26c308ed6. At first, we thought that it only occurs for some big WSDLs of a module, but for some reason, there were also small WSDLs that are experiencing this error, moreover, there are some big WSDLs that can be successfully mapped to a sub-integration.