jbpm-console login loading message is messed up in Japanese

Login loading message is messed up like following one:

￣ﾁﾊ￥ﾾﾅ￣ﾁﾡ￣ﾁﾏ￣ﾁﾠ￣ﾁﾕ￣ﾁﾄ￣ﾀﾂ

￣ﾂﾢ￣ﾃﾗ￣ﾃﾪ￣ﾂﾱ￣ﾃﾼ￣ﾂﾷ￣ﾃﾧ￣ﾃﾳ￣ﾂﾒ￣ﾃﾭ￣ﾃﾼ￣ﾃﾉ￤ﾸﾭ ...

It seems that localization message is correctly supplied. But displaying is wrong.
I want to know how to fix this issue.

I have confirmed the source of translation in jbpm-console.war.

jbpm-console\WEB-INF\classes\org\kie\workbench\client\resources\i18n\LoginConstants_ja.properties:

# translation auto-copied from project KIE webapp distributions, version 6.2.0, document org.kie/kie-wb-webapp/org/kie/workbench/client/resources/i18n/LoginConstants, author Junko Ito
loginAgain=\u518d\u5ea6\u30ed\u30b0\u30a4\u30f3
loadingPleaseWait=\u304a\u5f85\u3061\u304f\u3060\u3055\u3044\u3002
loadingApplication=\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30ed\u30fc\u30c9\u4e2d ...

—
loginAgain
"\u518d\u5ea6\u30ed\u30b0\u30a4\u30f3"
"再度ログイン"
↑Looks good, no problem.

—
loadingPleaseWait
"\u304a\u5f85\u3061\u304f\u3060\u3055\u3044\u3002"
"お待ちください。"
↑Looks good, no problem.

—
loadingApplication
"\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30ed\u30fc\u30c9\u4e2d ..."
"アプリケーションをロード中 ..."
↑Looks good, no problem.

—
However login loading message is wrong...

￣ﾁﾊ￥ﾾﾅ￣ﾁﾡ￣ﾁﾏ￣ﾁﾠ￣ﾁﾕ￣ﾁﾄ￣ﾀﾂ

￣ﾂﾢ￣ﾃﾗ￣ﾃﾪ￣ﾂﾱ￣ﾃﾼ￣ﾂﾷ￣ﾃﾧ￣ﾃﾳ￣ﾂﾒ￣ﾃﾭ￣ﾃﾼ￣ﾃﾉ￤ﾸﾭ ...