Forum Discussion
I'm not a user of the API, but will try to help if I can. As troubleshooting methods, have you tried specifying the Platform custom field explicitly so it is forced to return? And changing it to a Required field like the other two?
You may find that you will need help from Smartbear Support, but you won't find them here as this is a user forum. You can however raise a ticket with them here: SmartBear Support