Embedded view applet twisties blank view

I have a single category embedded view on a $$ViewTemplate form with the embedded view property set to display Using Java applet. The view has three categorized columns that display in the view. The form is accessed from the web and I have a few users that are having the following issues with the view. They are able to collapse two of the categories but when collapsing a third category, the view goes blank. Refreshing the page from the browser refreshes the view and the docs display again. I do not have any issues and have talked to several other users that do not have any issues with this at all. What is causing this issues? Could it possibly be the version of Java that the user has on their machine conflicting with the version of java on the Domino server? Any suggestions would be greatly appreciated as I have searched all of the Lotus forums and have not been able to find any solutions.