I'm using a cascading field that is required by post function validation to be required during a transition. This works just fine but I've noticed that both levels of the field are required. This is also fine, makes sense. However, the default None value that appears in the list will not be accepted as a allowed value when the field is required. Selecting JIRA->None for example will not allow you to finish the transition. Is this a bug or am I doing something wrong?