Previously we were using 3.x version and now currently in 4.x version all of the public methods are consolidated into one header to make it easier for developers.
Since there were changes in the new methods we have changed the way we are passing arguments to Adobe metrics site. We are successfully able to utilize trackState method and the data is reflecting in the Adobe report suite as expected. But we are seeing some issues with the trackAction method, we are seeing 200 response in the fiddler calls(attached) but the same data is not reported in Adobe report suite.
Please let me know if you need any more details.