Hi Klajdi,

Lucian using One page mode, so If you dont want to enable the one page mode for new menu item, simply define a rule via particle settings, Example go to Template settings -> base outline -> tab page settings -> scroll down then click to Onepage Navigation atom -> do following https://imgur.com/a/ksvHU

NOTE: You can see we added blog and particle menu item here to avoid the issue with #undefined. Simply add your menu items name here to avoid the issue.