Some logging doesn't print i18n message

AS7 master HEAD.

When booting JBoss with LANG=ja_JP.utf8, some messages appear in English though they have corresponding Japanese message.

For example, JDBC-compliant message:

11:24:18,084 INFO [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool – 27) JBAS010403: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3)

In ConnectorLogger.java:

@LogMessage(level = INFO)
@Message(id = 10403, value = "Deploying JDBC-compliant driver %s (version %d.%d)")
void deployingCompliantJdbcDriver(Class<? extends Driver> driver, int majorVersion, int minorVersion);

In ConnectorLogger.i18n_ja.properties:

deployingCompliantJdbcDriver=JDBC \u6E96\u62E0\u306E\u30C9\u30E9\u30A4\u30D0\u30FC %1$s (version %2$d.%3$d) \u3092\u30C7\u30D7\u30ED\u30A4\u3057\u3066\u3044\u307E\u3059\u3002

(Native: deployingCompliantJdbcDriver=JDBC 準拠のドライバー %1$s (version %2$d.%3$d) をデプロイしています。)

I'm attaching server.log and boot.log.