Not sure maybe it’s a timing thing, but I doubt it. I’m on v1.0.64.
I have a site column that is a managed metadata column with a term set. Works fine. After I setup the list, if I go in and later add a new term to the term set, then the new terms will not appear as options when I click the tag icon in the form. If I close the form and edit the list in grid view and select the cell, I can see the new terms that way, but not in the DFFS form.