boolean changing value in a RR loop

Hi guys,
I've got something strange happening to me here:
I've got a boolean to manage what's displayed in a WOComponent.
an action is triggered inside this WOComponent and changes the value  
of the boolean (to "true").

If I check the value of the boolean inside this action, it has the  
correct one (which is "true").
The action return context().page() to display the same component but  
with an extra part;)

I also have a custom append to response, but it doesn't change  
anything regarding this boolean, in addition I tested just at the  
beginning and at the end the boolean and it is "always" false.

So I don't know and can't find what's changing the boolean to "false"?!
If I set it to "true" at the WOComponent initialization, it stays  
"true"!

Is there any way I could check what is accessing this boolean in a  
request-response loop?

Thanks a lot for any pointer:)

Xavier