2 Different Responses for Start Process Instance REST Call Between Dev and Prod Instances

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We are executing a PUT REST call using url /bpm/api/4.0/processes to start a process instance. We are getting 2 different responses between our Dev and Prod instances. The 2 responses are below.

You can see in the PROD response we are getting back the Process Instance ID. However, in the DEV response we getting back a Conversation ID. If we want to get the Process Instance ID we have to execute an additional REST call.

This is causing us issues because we are executing these REST calls from our VBCS application and we require the Process Instance ID. We use the Process Instance ID to issue additional REST calls to our Process application.