Pasted Unicode is displayed wrongly

When I paste the following text "정보를 무단으로 도용 시 법적인 책임은 본인에" in a TextEditor field, it seems the text is correctly pasted but it is not correctly displayed. Might be related to the font used.

Any suggestion how to handle this best?

Yeah, there won't be a problem with the unicode representation, it's almost certainly that the font you're using doesn't support those characters.