calais term selector doesn't recognize terms with commas

If you have a node in which Calais identifies the city Washington, D.C., the term necessarily contains a comma, which is also the separator for different terms.

Drupal rightly presents these in the input field with quotation marks, so that the term doesn't get divided in two by the comma inside the term.

However, Calais doesn't recognize the term when it is surrounded by quotation marks.

If you want to remove or add the "Washington, D.C." term by clicking on it in the list of suggested terms, nothing happens to the term in the list.

If you want to add the term, the module's script inserts Washington, D.C. into the input field, which upon saving will turn into two terms: Washington and D.C.