Popup Panel is auto-sized before the images are loaded

[step-app]

My main page has a conditionally rendered popup panel. When some condition arises server side, the popup panel is rendered, and is immediately displayed (show="true").

Code snapshot:

<h:panelGroup rendered=#{dialogLogic.dialogRendered}>
     <rich:popupPanel show="true" autosized="true" modal="true"domElementAttachment="parent">
          <div>
               <h:graphicImage value="some-img"/>
          </div>
     </rich:popupPanel>
</h:panelGroup>

The problem is quite simple: the first time the popup panel is rendered, it has an incorrect size. By incorrect, I mean that it's size is computed as if the image had a 0 size. I had a look to what happened in the browser, and I could see that the size of the popup panel is computed before the image is actually loaded. Then, when the popup panel is rendered again later, it has a correct size, because the image is in the browser cache.

Question:

Do I have a mean to tell richfaces to compute the size of the popup panel after the image is loaded?

Thanks in advance for your support.