Been playing with this issue. It is a matter of the new horizontal look.
If the Family Page is not full screen but run in a smaller window, the selection and a creation of a new fact works perfectly. You have to refresh the page when completed or the selector does not return to the default Annulment selection.
In full screen, the add a fact form always defaults to either the default Annulment selection or the previous selection used while in a smaller window. The latter case is if the page was not refreshed after a selection was made in the smaller window.
Hope this explanation isn’t too confusing.
Weird but usable if the user understands what is going on.