I have two SharePoint servers one has session state enable and the other doesn't. There is a page in both  which uses filters with the JS API for create, set and refresh the webparts. The SP server with the session state enabled works like a charm but the other one has some weird behavior, lets say that the filters passed are not in sync across all webparts and the chart designer shows messages like root element is missing and does not always stores the configuration set even if it was applied. 
Is it possible that not having Session Stare for storage configured in the second servers causes this kind of issues?