Dashboard not visible in sidebar

In my Home Assistant setup, the auto dashboards “lights” and “overview” are only visible in the sidebar, when I choose one of them as default dashboard in the user preferences. If I select a different dashboard as default, both entries disappear. Everything worked after the initial installation, but after I selected and then deselected the entries as default, they disappeared.from the sidebar.
How can I fix it? Its there a configuration file, which I can edit?
BTW: They are not hidden in the sidebar edit menu - the simply are not shown there.

You can put it back in the side bar. Long press the “Home Assistant” at the top of sidebar to edit the sidebar. Un-hide the overview dashboard.