Since version 2.3.0, Kirby only applies the default template

The CMS Questions
5

Yes, I plan to use multiple language in a future version and already prepared one default language:

c::set('languages', array(
  array(
    'code'    => 'de',
    'name'    => 'Deutsch',
    'default' => true,
    'locale'  => 'de_DE',
    'url'     => '/',
  )
));

Removing this configuration snippet solved this issue. Am I doing something wrong?

Thanks for your help.