Removing a menu item (tab) visibility for a certain user

Hi everyone,

I have  a menu with 4 items (tabs).

I want to prevent  a user from seeing tab number 2. 

On the menu entity, I've got visibility permissions for the user group that this user belongs to (So that they can see the entire menu). I just want this user to not see a single item in this menu.

On the group association I have added the group that this user belongs and another random group.

PS on menu item number 2, I added only the random group.

Despite all this the user can still see menu item 2.

How can I prevent this from happening?

Best Regards,