Sharepoint navigation bar disappears in the library lists integrated in Microsoft Teams

Hi,

I recently tested the integration of Sharepoint online into a custom Microsoft Teams application.

After creating a hub site that contains several child sites, I managed to finalise the integration into Teams. However, I have a bug on the library pages. The hub navigation menu disappears on these pages:

Homepage of my hub site "RDDM intranet" with navigation top bar:

Navigation top bar disappear when I go to the library "Demande aux guichets" (direct link in the hub navigation):

The navigation top bar is however clearly visible in sharepoint online:

Have you already noticed this problem and found an issue?

Thank you in advance.