After digging through and analyzing the data being sent from Magento to Google Analytics (GA), it seems that after the 18.104.22.168 update was applied to the site, Magento began sending successful transactions in duplicate to GA.
Analyzing a "Duplicate Transactions" report in GA, there's a clear transaction where it goes from 1 transaction sent / order to 2. Tracking that order number and comparing it to the commit history in the repo, the only update made to the code base on that date was the launch of the new version 22.214.171.124.
The code is properly implemented in the success.phtml page as expected, and runs the GA Universal Tracking code. There are other conversion code snippets on the page, they all show a duplication after the date in question.
Has anyone else experienced this? Anyone have any idea as to why this would be happening or a solution?
Any help would be greatly appreciated!