Adding new Nav Menu items linked to specific page removes added item

If I add a new nav menu item that is linked to the Services page in the below-linked website, the newly added item gets removed from the designer, but only when linked to the Services page. If I link a new nav menu item to any other page it doesn’t get removed.

Any help much appreciated!

Hi @matthewosullivan,

Do you have any custom code in your project settings that is keeping you from doing this?

If not then I would say this is a bug. @rileyrichter or @Brando do you guys have any thoughts?