I'm creating shortened links via the API. UTMs after the first '&' are being stripped off in the response. I've tested using Postman, in the app I'm creating (NodeJS), and on the https://developers.rebrandly.com/reference#create-link-url "try it' feature.
What comes back (after shortened URL is clicked):
this gets stripped off ---> &utm_medium=social&utm_campaign=something&utm_context=anotherthing