Korean RevisedRomanization throws exception on 'ㄶ'

I recognize that this package is not actively maintained, but for record keeping purposes, Romanization.Korean.RevisedRomanization Process(...) fails on ㄶ.

Exception: The given key 'ㄶ' was not present in the dictionary.

Example term: 당신은 음식을 원하지 않아요