I am using Umbraco version 7.5.4 and Umbraco Forms version 4.3.3 I have a setup where I have a Datatype using the Umbraco.DropDown property editor and it contains each state in the U.S. as a prevalue. I am then using this Datatype as a Prevalue Source in a form in Umbraco Forms. I have a workflow on this form that saves an Umbraco content document and maps the "State" field in the form that uses the Prevalues to a "State" property on the content doctype that uses the dropdown Datatype mentioned above.

When the form is filled out, the content document gets created correctly and all the fields that are mapped get populated with the correct values from the form except for this "State" property. It is always empty.

I have this exact same setup on a site running Umbraco 7.3.0 and it works correctly on that one. I'm assuming something in the later version broke the ability to have that setup and this may be a bug?