In the admin2 interface, if you use the context menu with the option create, if you have too many classes in a way that the menu is bigger than the page, you won't be able to scroll it to choose the correct object class.

Steps to reproduce

In the admin inteface, click on the icon that starts the context menu.

Select the create here options.

Try to select the first class if there are too many to be bigger than the height of the page