developerPayloadAndroid is not working.

[majaeseong]

Hello.
I'm trying to use developerPayloadAndroid to differentiate the server to which that data is sent.

Purchase a subscription through the requestSubscription function and listen to the

purchase.developerPayloadAndroid = 'DEV';
          purchase.developerPayload = 'DEV';

in the purchaseUpdatedListener and put the value directly into the finishTransaction.

However, the developerPayload received from the server was ''.

Why is that and how should I set it up?