Empty taxonomy term field results in creation of term: 'Array"

I added the ability for a user to add up to three "tags" for a content type, and I am using this module as the widget.

If any of the three input boxes are left empty, then for each empty input box that exists, when the user clicks "Save," a new taxonomy term is created by the name of "Array."

So, for example, if the user entered:

Box 1: Wine and Cheese*
Box 2:
Box 3:

*Note that Wine and Cheese is a new term that does not already exist

Then, there are three new taxonomy terms created:

1. Wine and Cheese
2. Array
3. Array

As a quick fix, I have the Rules module deleting any new taxonomy terms with the name of "Array."