When using Dropdown Tags widget, selecting an item, then changing the locale, the dropdown loses its selected value. 

Here we have an example of a dropdown tags items, one that has the selected value(s) assigned as the StartingSelection, and the other has the StartingSelection set to null.

An option was chosen, in our case "Ben White". When the locale changes from English to Arabic, we can see that the one that has the selected items as the StartingSelection retained the selected option, the other did not.