Variable Scope on Cluster

I developed a xPages, which contains within it n views.

Clicking on a document for a view, in other views should only see the linked documents.

On click of a document row set a variable scope (i tried request/session/application), I use then in search of other views.

Everything works on a single server not clustered, but on servers in the cluster, variable is read only by first server.

Possible solutions? Suggestions? With the release of Domino 8.5.1 is expected any fix?

Thanx

Ivan Giannattasio