according to jsr 168 spec:
PLT.9.2 MAXIMIZED Window State
15 The MAXIMIZED window state is an indication that a portlet may be the only portlet being
rendered in the portal page, or that the portlet has more space compared to other portlets
in the portal page. A portlet may generate richer content when its window state is
that means that if on of the portlets is maximized, other portlets still can be visible, thus doView of them still needs to be called.
Well yes, but it actually is the only portlet visible on the page at the time, strange to call render methods on non-visible portlets...
Maybe this is vendor specific, I recall other portals not calling non-visible portlets.
But maybe I can live with this when its a known feature :) The spec actually doesn't specifically address this so it may differ.