Bug report : menu & roles

Hello, I’m experiencing bugs when creating menus:

1. When I update the “lib” menu to rename it to “librairie”, the loader keeps spinning continuously (28th second). I have to reload the page for the changes to take effect.
   

2. When I try to switch menus by clicking on Production (55th second), the displayed menu does not change. I have to click on “back to list” to select the “Production” menu again, and only then does the “Production” menu appear.
   

3. When I try to forbid the “Page” entry in the menu for contributors, the “update” button also keeps loading continuously (1:23). I have to reload the page for the changes to take effect.
   

4. Finally, on the contributor’s dashboard, the “Page” entry is still accessible even though I have forbidden it (1:56).