Xray causes Yield to be empty

[sebastianzillessen]

Hi,
In our application (big business application) we have the problem, that for on of our pages the sidebar
which is included in the view with = yield :sidebar is not rendered.
The only special thing about that page is, that the yield is filled from a gem (so the content_for :sidebar calls are done in a separate gem).
As soon as we remove xray-rails it works fine. Has anyone encountered a similar problem? And might be able to point me in the correct direction?
Thanks!