[NSWorkspace desktopImageOptionsForScreen:] does not return key "Show on all spaces"

It seems this method is not updated for the new "Show on all Spaces" option in system wallpaper preferences.

I encounter this problem because one customer reported that every time my app sets a new wallpaper, this option is turned off.

NSDictionary* options = [SHARED_WORKSPACE desktopImageOptionsForScreen:screen];

[SHARED_WORKSPACE setDesktopImageURL:imageFileURL
                                       forScreen:screen
                                         options:options
                                           error:&error];

This can be easily verified by dumping the returned dictionary - which only contains 3 keys.

Is this a known bug?