Custom parameter becomes zero when is clustered.

Hello.

I created a custom parameter that integrates IGH_Goo derived objects (not geometric). These parameters contain high level objects included in the Rhino document.

When one of these custom parameters is inside a cluster, its content is canceled. In the interior view of the cluster, it works properly, but in the whole workspace view the content of this parameter becomes null.
Any idea?

Thank you very much

1) Start proyect. BeamSt is the custom parameter. All works fine.

2) The BeamSt param is clustered. The cluster view works fine

3) In the whole view, the cluster result is null, because the BeamSt param becomes null

4) If the custom param (BeamSt) is in top-level workspace (outside any cluster) all works fine. Any problem occurs if I clustered standard GH params.