[Plugin: Magic Fields] Data disappering w/ drop down selection

In my write panel I have a group which has an optional drop down field. In that drop down field there are single word options (ie: “Dinning”) as well as multiple word options (ie: “Festivals & Events”).

I’m having an issue with data disappearing when one of the multiple word options in the drop down is selected. Should that be expected, or is it a bug?

Thanks.