folder_contents view add contents in parent folder

[skillfully]

Adding new content in folder_contents view results in new content in the parent folder. For example, actual path is /a/b/c and adding new content "d", the expected path of "d" is /a/b/c/d, but the real result is /a/b/d.

Environment:

• Plone 5.1.2.1 (5112)
• CMF 2.2.12
• Zope 2.13.27
• Python 2.7.12 (default, Dec 4 2017, 14:50:18) [GCC 5.4.0 20160609]
• PIL 4.3.0 (Pillow)

Looking at the developer network tab, I saw that @@fc-contextInfo is called multiple times. The response includes the wrong path informations for the add menu and the following responses include the right path informations, but they are not use for the add menu.
I've added an HAR-file (renamed to txt) of these network communication.
plone.app.content.txt

The issue is taking place for the first site request. If you force a page reload (e.g. hit "F5") the paths of the add menu are correct.