Menu title not hideable

Hi

I've been trying to remove the "Title" (Main Navigation) from the menu in drupal 8.
I'm using the Zircon theme with the standard navigation that comes with that theme. As a logged in user or as admin the "title" disappears, but as a unauthorized user the title always shows up.

I've tried using " < none > " but that doesn't work.
This is for the uanauthorized user;
https://postimg.org/image/g3woicx0x/

And as admin;
https://postimg.org/image/pcyush5wx/

Iv'e tried the Menu > Block layout > Configure and toggling of the title in the checkbox, but it doesn't do anything, the title "Main navigation" still shows up for non admin users.