Hi Saguaros,
No, unfortunately it does not work as expected.
It should work in a way where the Off Canvas Menu closes immediately after clicking on a menu item. And unfortunately it doesn't, it just stays open. In other words, the Off Canvas Menu with all menu items should disappear after clicking on a menu item on the left side of the viewport. Afterwards, only the burger icon should be displayed in the place of the Off Canvas Menu to open the menu again.
It should basically work like in the following website: https://www.eibesthaler-passion.at/ This is not a one-page website, because there are also submenu items for subpages. In principle, however, it works here as expected. Please try the navigation of this website. This is how it should work for the problematic websites I mentioned. If the Live Previews of the Joomlabamboo templates were still online, you would be able to see the correct behaviour of the Off Canvas Menu there too. But unfortunately the Live Previews are no longer accessible. You can also take a look at the Off Canvas Menu "More" from https://www.joomlabamboo.com/. Like here, the menu should also work in my websites.
Thanks,
Leo