On the Korean Wikipedia, when attempting to run /identify using the URL https://ko.wikipedia.org/w/index.php?title=Special:OAuth/identify and a signature with said URL encoded, OAuth will redirect to https://ko.wikipedia.org/wiki/%ED%8A%B9%EC%88%98:MWO%EC%9D%B8%EC%A6%9D/identify and reject the signature.
When attempting to run /identify with the URL https://ko.wikipedia.org/wiki/%ED%8A%B9%EC%88%98:MWO%EC%9D%B8%EC%A6%9D/identify encoded into the signature, OAuth will still reject it, thus making OAuth unusable on kowiki.