[BUG] REDIRECTION: Japanese characters in query string

Hello,

I have found a bug that when a static page option is enabled from here:
http://jom.x10.mx/wp-admin/options-reading.php

Then, you accessed the home page with the Japanese characters on the query string, it causes redirection issues “ERR_TOO_MANY_REDIRECTS”.

Example link is: http://jom.x10.mx/?%E3%83%89%E3%83%A0%E3%83%BB%E3%83%88%E3%83%AD%E3%83%94%E3%82%AB%E3%83%AB%E3%83%86%E3%82%B9%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97

You can test this on any self hosted WordPress installation with the “static page” option enabled. This causes our client’s SERP to have been ruined.

The page I need help with: [log in to see the link]