Navigation tree is not showing nested pages with trailing space in link

Here is reproduction steps :

• Create a page named "Root"
• Edit page Root in WYSIWYG
• Add text with trailing space like this : "Document with trailing space "
• Select the text AND the space
• Click on the icon “link” or CTRL+L shortcut
• Leave everything by default and click OK
• Save and view
• In the page Root, click on the link "Document with trailing space "
• Create and Edit
• Add a new text, for example : "Sub document with trailing space " with trailing space, and recreate the link like previously
• The document "Sub document with trailing space " is not visible in the tree.