I had an issue when trying to refund transactions in Analytics.
I could produce the request and copy to clipboard.
So far so good.
But when reviewing the request I found that the transaction revenue parameter (tr) was set to zero (0).
The ts and tt parameters where negative as expected.
I also tried to do a refund without debug mode and the problem was the same. Transaction revenue was zero.
I assume this could be a bug since this article told me that the revenue parameter should be negative equivalent of the original transaction.
There was no error or warning in the chrome debug console.
Hope this helps and thanks for a great addon!
Customer support service by UserEcho