In Activiti Designer 5.14, custom form property information is removed when switching to the form property editor and storing changes. With 5.12 it worked well.
To reproduce the problem, open the attached model in Activiti Designer 5.14. Open the properties of the usertask1 and change to the Form tab. After that, store the model.
The <activit:value /> elements will be removed from the xml-model file.
The effect was found using Activiti Designer 5.14 installed in Eclipse Kepler but also with Eclipse Juno and Activiti Designer 5.14.
A detailed description may be found at