I added a tutorial for how to add a controlled vocabulary field. As part of
that, I have a section at the end that explains how to make the controlled
vocabulary selector start with the controlled vocabulary setup when the
controlled vocabulary selector field was defined. I didn't push the fix,
because I wasn't sure if you intentionally removed this code.
BTW, the tutorial contains a step requiring direct manipulation of database
tables to connect the attribute loop field to the subloop element. If there
is a way to accomplish this through the interface, that would be excellent
information to have.