Glossify not working with Advanced book blocks

Hi,

I have an issue with glossify (though whether it could be caused by something else I've done on the site), but even though it isn't something I need fixed, I thought I'd report it in case fixing it can help improve the module.

I have created a custom book page with an advanced book block incorporated into it using the composite layout module. When I select this content type in the 'link from' menu, and then view a node of the content type, the book block disappears. When I unselect it, the book block reappeares.