Preconditions: at least one child of eZ Platform content item
1. Go to Content/Content structure
2. Go to Locations tab of eZ Platform
3. Mark it as invisible
4. Go to the child content item of eZ Platform
5. Go to Locations tab - see attachment now please: if you click on the eZ Platform underlined with green - everything is OK, you will be moved to eZ Platform preview, if you click on the eZ Platform underlined with red there will be an error "Location cannot be displayed as it is flagged as invisible".
There are also two different links:
a) green: localhost/admin/content/location/2
b) red: localhost/admin
but as an end-user I would think that both "eZ Platform" are the same, s o it could be misleading.