TYPO3 Core

In my site configuration I have configured a aspect of type PersistedPatternMapper for the detail view of a record of my custom extension.
If the configured route field contains a slash, a error occurs in the frontend.

You can reproduce the bug using the news extension. I know, the news extension has a slug field but my custom extension which you dont't have has not.
This is the site configuration:

routeEnhancers:
  NewsPlugin:
    type: Extbase
    extension: News
    plugin: Pi1
    routes:
      - { routePath: '/news/{news}', _controller: 'News::detail', _arguments: {'news': 'news_title'} }
    defaultController: 'News::detail'
    aspects:
      news:
        type: PersistedPatternMapper
        tableName: 'tx_news_domain_model_news'
        routeFieldPattern: '^(?P<title>.+)-(?P<uid>\d+)$'
        routeFieldResult: '{title}-{uid}'