Primefaces: dynamic content update issue

I have a webapp where I select some content to be removed. A modal popup showing a preview of the selected image / flash. I pressed the button and everything works fine. But when I select other content to be deleted, the modal pops up and for a microsecond displays the previously deleted file, which is then replaced with the new content I want to delete.

The code for displaying dynamic content looks like this:

For images:

<p:graphicImage value="#{controller.tempImage}" height="110" 
    id="imageID" />

      

        
        
        
      

    

For flash:

<p:media value="#{controller.tempImage}" width="110" height="110" 
    id="imageID" player="flash" /> 

      

        
        
        
      

    

Controller:

public StreamedContent getTempImage() {
    try {
        FacesContext context = FacesContext.getCurrentInstance();

        if (context.getRenderResponse() ) {
            return new DefaultStreamedContent();
        }
        else {              
                tempImage = new DefaultStreamedContent(new FileInputStream("pathToFile"), "image/jpeg");                
        }
    } catch (FileNotFoundException e) {
        tempImage = new DefaultStreamedContent();
    }

    return tempImage;
}

      

        
        
        
      

    

I tried setting tempImage

to null before loading and autoUpdate=true

in modal but no luck.

Delete button (the one showing the delete mod):

<p:commandButton id="btnDelete" value="Delete" onclick="deleteModal.show();"  actionListener="#{controller.initDelete}" update=":deleteForm">                                       

      

        
        
        
      

    

Remove form (xhtml):

<h:form  id="deleteForm" enctype="multipart/form-data" >
<p:dialog id="deleteDialog" widgetVar="deleteModal" modal="true" resizable="false" draggable="false" autoUpdate="true">
        <p:outputPanel autoUpdate="false" >
            <p:panelGrid id="panelId">
                <p:row>                 
                    <p:column>
                        <p:panelGrid id="bannerPanel">

                            <p:row>
                                <p:column>
                                 <p:graphicImage value="#{controller.tempImage}" height="110" id="imageID" />
                                </p:column>
                            </p:row>    

                        </p:panelGrid>
                    </p:column>
                </p:row>

                <f:facet name="footer">
                    <p:row>
                        <p:column>  
                                <p:commandButton id="doDeleteBtn" value="Delete"
                                     actionListener="#{controller.delete}" >                                                        
                                </p:commandButton>
                        </p:column>
                    </p:row>
                </f:facet>
            </p:panelGrid>
        </p:outputPanel>
</p:dialog>