Logout on Expired session - OOM

[lasimo]

In my application one page is loading a list of BLOBs as attachments. If the session expire and I try to logout the app is redirecting me on the login page, that's fine, but as soon as I try to login the application goes in error with an OutOfMemoryError: Java heap space.
This thing does not happen on other screens and does not happen if I click on other button or I do other actions in the Application, even on the mentioned page.
I never worked with Seam before but seems to me that Seam is trying to restore an old session, which is invalid now.
I tried to find a solution but I really really do not have any ideas what could be.
Any suggestion will be greatly appreciated!

I believe my page.xml is standard:

<page view-id="/visit/listVisits.xhtml">
          <begin-conversation flush-mode="manual" join="true" />
     </page>
     <page view-id="/login.xhtml">
          <navigation from-action="#{identity.login}">
               <rule if-outcome="loggedIn">
                    <redirect view-id="/index.xhtml" />
               </rule>
          </navigation>
     </page>

And this is part of my web.xml:

<listener>
          <listener-class>org.jboss.seam.servlet.SeamListener</listener-class>
     </listener>
     <filter>
          <filter-name>Seam Filter</filter-name>
          <filter-class>org.jboss.seam.servlet.SeamFilter</filter-class>
     </filter>
     <filter-mapping>
          <filter-name>Seam Filter</filter-name>
          <url-pattern>/*</url-pattern>
     </filter-mapping>
     <servlet>
          <servlet-name>Seam Resource Servlet</servlet-name>
          <servlet-class>org.jboss.seam.servlet.ResourceServlet</servlet-class>
     </servlet>
     <servlet-mapping>
          <servlet-name>Seam Resource Servlet</servlet-name>
          <url-pattern>/seam/resource/*</url-pattern>
     </servlet-mapping>
     <!-- JSF -->
     <servlet>
          <servlet-name>Faces Servlet</servlet-name>
          <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
          <load-on-startup>1</load-on-startup>
     </servlet>
     <servlet-mapping>
          <servlet-name>Faces Servlet</servlet-name>
          <url-pattern>*.jsf</url-pattern>
     </servlet-mapping>
     <context-param>
          <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
          <param-value>server</param-value>
     </context-param>
     <context-param>
          <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
          <param-value>.xhtml</param-value>
     </context-param>

Thanks!