Property shortcuts don't work in State context?

Trying to define a dropdown list parameter based on a property. I've got a property sheet properly constructed on my Project. If I create a Procedure parameter, I can set the parameter to be a dropdown list and enter, for instance, "/myProject/foobar" for the property reference in the parameter definition and it works.

However, if I try to do the same thing for State parameter in a workflow, it doesn't work. The reference to "/myProject" fails. I can get it to work using an absolute property path like "/projects/myProjectName/foobar", but that's not dynamic and relies on the Project name not changing.

Why doesn't the property shortcut work in the State context? Is there a workaround to get this to work?