Missing page in breadcrumbs treeview when treeview is expanded

Hello,

I have a parent page with x children pages and to list all pages in breadcrumbs I must click on "x more ..." to expand treeveiw. When treeview is expand one page missing.
The missing page is the page who must be at "8 more ..." emplacement in the tree.
The returned JSON (when I click on "x more ...") contains missing page in first position.

To help to reproduce the problem, here a xar file to test.

Step to reproduce:

• import Unable to embed resource: Test.xar of type application/vnd.xara
• Go to the page not displayed:
  http://localhost:8080/xwiki/bin/view/Encyclop%C3%A9die/Vade-mecum%20CP2I%20pour%20l%27%C3%A9tude%20et%20la%20r%C3%A9alisation%20de%20projets%20SI/Concevoir%20l%27architecture%20technique%20applicative/
• Click on breadcrumbs Treeveiew on parent page: Encyclopédie>Vade-mecum CP2I pour l'étude et la réalisation de projets SI and "6 more ..." to expand the tree
• the page "Phase - Concevoir l'architecture technique applicative" between "Objectifs, périmètre, avertissement" and "Phase - Existant, diagnostic, esquisse de la cible" is not displayed

ty

Pascal B