transactionID does not appear in Analytics when set in XDM using WebSDK

Hi gang,

I'm working through the final details in our transition to the WebSDK for data collection and I have encountered a snag... It seems that when transactionID is specified in the XDM JSON, that value never seems to get forwarded to Analytics. I know this because 1) Our TransactionID processing offline doesn't work, and 2) For debugging, I copy the inbound transactionID into an eVar, and that shows that nothing is coming through.

Bear in mind that in our non-WebSDK implementation, transactionID is set in the AppMeasurement instance and can be seen in the "xact" query string parameter. It shows up in Analytics just fine.

In the XDM, I'm setting it in the commerce.order.payments[] array, roughly as:

{

  commerce: {

    order: {

      payments: [

        {

          transactionID: 'something',

        },

      ],

    },

  },

}

It seems that no matter what combination of other properties I include in the commerce or commerce.order object make any kind of difference. I can track purchases, so I know that at least something from commerce is getting forwarded to Analytics. productListItems seems to work as well, as I can see Product Names in Workspace.

Has anyone encountered this? Is there some undocumented combination of required properties that must be set in order for transactionID to be seen in Analytics?

Thanks!