Setting Vocabulary Widget doesn't work

• I create a new doc type
• I go to the creation form
• I configure the widget bound to dc:title
• I set the vocabulary widget
• I click on select vocabulary
• I click on create vocabulary
• I type test as vocabulary name
• I click on save twice
• I navigate out of the document

*Problem*:
I come back to the document into the widget configured, text is still the widget set.