We have run into a strange menu-bug of some sort twice now, and have no idea where to look for answers.
We are using default Appearance>Menus to create/manage, and in addition to the standard Header/Footer, we have created several “Guide Menus”…these are placed into our site in a vertical side-bar (column) using the Pro Element “Navigation Layered”.
We have encountered that when editing/updating these “Guide Menus” in the backend (adding/arranging new subitems) - the content previously saved in the menu will disappear.
The last time we saw this…we were in the process of adding new sub-items to the menu (from Appear>Menu), but had not even saved those updates…and the live menu on the site had already removed about (4) parent items & all of their child items.
These are not small menus, and there is no clean way to backup/fix the issue when this happens…we basically just have to recreate them (and hope that we didn’t forget any content that was previously there).
WP Login is below, and we can provide SFTP if you want to inspect at that level – any help would be appreciated.