Header row columns is not displayed in the same sequence as report rows in Rest UDR post calls

Report header columns are not displayed in the same sequence as the report row in Rest services User Defined (UDR) Post Call response. Oracle indicated that the report header is being returned as a Jason object as opposed to a Json array, so there is no guarantee of order for Rest API. However, SOAP webservices the header and detail rows are ordered and in sequence.

This resulted in inability to map the column numbers to header names. The alternative is for us to manually map the column number to the header names which will cause issue if columns are removed/updated from the UDR. We are using this in Azure Data Factory