It's related to AS7-4735. Currently Japanese message resources are missing parameter index and causes format errors.

When this happens, it prints only format error and the original log message is not logged. This makes troubleshooting impossible. We need fall back mechanism to avoid "logs are missing" situation.

This format error very likely could happen all time. For example, when someone add, remove, swap or replace existing log message parameters and forgot to update all i18n properties accordingly at the same time.