iOS 8 share extension doesn't work with iBooks

I try to share selected/highlighted text in iBooks with my custom extension, but it doen't have anything inside self.extensionContext

<NSExtensionContext: 0x17541d90> - UUID: <__NSConcreteUUID 0x1765e860> D69F0393-C5F1-4DEB-9A97-B479C2BC0C95 - _isHost: NO
items:
(
)

so after i choose my extension in provided list it just pops up empty SLComposeServiceViewController

Mail, iMessages, Twitter etc. works as expected. Is there any additional magic i must do to handle this?

It does seem like that the issue has been resolved with iOS 9, the following code (in Swift) correctly returns the contents of the selection in iBooks:

for item: AnyObject in self.extensionContext!.inputItems {
        let inputItem = item as! NSExtensionItem
        for provider: AnyObject in inputItem.attachments! {
            let itemProvider = provider as! NSItemProvider
            if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeText as String) {
                itemProvider.loadItemForTypeIdentifier(kUTTypeText as String, options: nil, completionHandler: { (txt, error) in
                    NSOperationQueue.mainQueue().addOperationWithBlock {
                            //Doing stuff with txt
                    }
                })
            }
        }   
    }