OpenEntityManagerInViewFilter not working - Spring MVC

Ok, so I am once again going nuts trying to solve the OpenEntityManagerInViewFilter problem.

I have looked around a bunch, read a lot of the other questions (that this might seem like a duplicate of) but no joy so far.

So here's the deal: Spring4, XML based web.xml but java vconfig for the rest of my app context setup. I thought it might be related to this solution: https://stackoverflow.com/a/7015927/258813 (the ContextLoadListener and the servlet config both loading the app contexts), however, I have ensured that they both explicitly reference different configuration files. I have also previously had problems when different config files were @ComponentScan-ing the same locations so the context was loaded twice, but that is not the case either.

Web.xml (relevant bits)

<servlet>
        <servlet-name>webapp</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextClass</param-name>
            <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
        </init-param>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>com.tmm.frm.configuration.WebMvcConfiguration</param-value>
        </init-param>
    </servlet>

<context-param>
    <param-name>contextClass</param-name>
    <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
</context-param>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        com.tmm.frm.configuration.ApiSecurityConfig
        com.tmm.frm.configuration.ApplicationContextConfiguration
        com.tmm.frm.configuration.WebSecurityConfig
    </param-value>
</context-param>

The security configs are both just standard WebSecurityConfigurerAdapter extensions, no other scanning/context jazz.

WebMvc config:

@Configuration
@EnableWebMvc
@ComponentScan("com.tmm.frm.controller")
public class WebMvcConfiguration extends WebMvcConfigurerAdapter{

App Context Config (persistence stuff etc)

@Configuration
@EnableTransactionManagement(mode = AdviceMode.ASPECTJ, proxyTargetClass = true)
@ComponentScan({"com.tmm.frm.service", "com.tmm.frm.helper","com.tmm.frm.core.dao", "com.tmm.frm.security"})
@PropertySource("classpath:META-INF/spring/database.properties")
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class ApplicationContextConfiguration {

So both the relevant config classes are specifically defining different packages etc. Web.xml names configs to load by name so neither config classes are being loaded twice.

Then, I hit the controller - I load the user profile from the Secuirty Context (in the controller), then I jsut try to loop through a collection on the UserProfile that is lazily loaded - I would expect the OpenEntityManagerInViewFilter to kick in and load the collection (as a session is still open) but I get the normal can't load lazy object error. The logs clearly states that the filter is called, so I assume somewhere there are two contexts - any one suggest where the rogue context might be?