af:message sometimes does not show error message

Question

Have a page that has a popup to show some information.
In page, used this to show error message that occured during save.
          <af:messages globalOnly="true" inline="true"  inlineStyle="padding:10px;" id="m4"/>
In popup, used this to show error messages that occurred while performing some action.
          <af:messages globalOnly="true" inline="true" id="m2"/>
Whenever any error occurs while performing some action in page, error message is shown.
Then open the popup
Whenever any error occurs while performing some action in popup, error message is shown properly in popup
But after closing popup, not able to show any error message in page. In bean error message is added to FacesContext, but not shown in UI.
What would be the problem here?
JDev version: 11.1.1.6.0
Thanks,
Bhaskar Pola

Answer 1

Thanks Vinay for the link. However still facing the issue.
This method will be invoked from page.
    public void onDelete(ActionEvent actionEvent) {
        RowKeySet rksSelectedRows = table.getSelectedRowKeys();
        int count = rksSelectedRows.getSize();
        if(count == 0){
            FacesContext facesContext = FacesContext.getCurrentInstance();
            facesContext.addMessage(null,
                                    new FacesMessage(FacesMessage.SEVERITY_ERROR,"Atleast one row should be selected.",null));
            facesContext.renderResponse();
        } else {
           ADFUtils.showPopup(deletePopup);
This method will be invoked from popup withing same page.
    public void multipleSelListner(ActionEvent actionEvent) {
        List<String> list = (ArrayList<String>)ADFUtils.getPageFlowValue("selList");
        try {
            if(list != null && list.size() > 0){
                if(list.size() > 25){
                    error = true;
                    FacesContext facesContext = FacesContext.getCurrentInstance();
                    facesContext.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR,
                                            "Maximum 25 items can be selected.", null));
      facesContext.renderResponse();                                           
                    return;
        } catch (SQLException e) {
            System.err.println(e.getMessage());
            e.printStackTrace();
I have removed some extra code...
Looks like problem is with 2 af:message tags. When popup shown with error message second af:message within popup gets preference. Subsequent messages are pointed to that one.
May be related to unloading popup content from document. Not sure though.
Thanks,
Bhaskar