On one of our customers solutions, we save a json object to the values on a radiobutton list on an itemtype, and we used to be able to extract it cleanly through templatetags on the paragraph using it, but after the latest upgrade (9.10), it gets URL encoded (see images below)
How it looked in templatetags before: {"name":"Personal Recommendations for You","urlName": "GetUserRecommendations","mandatoryParameters": []}
How it looks in templatetags now:
It took me a while to find this error after upgrading, but I've just used HttpUtility.UrlDecode() to extract the correct data again, but I was encouraged by a colleague to ask if this new behaviour is on purpose? Because I assume there are several other customers who might use some sort of special character in their itemtype values with the same issue once they upgrade.