URL is not active after creation

Steps

• Make sure you have a website
• Add a page to the website (for example on URL /test.html) and click save
• Go to the url (/test.html)
• --> result: 404
• Clear the cache
• --> result: OK

Affected versions

• It seems Symfony version 2.7.25 and the newest 2.8 have this problem

Requirements

• The URL should work without a (manual) cache clear
• In all supported Symfony versions