I have modified the poc so that the first submenu has a menuitem to dymamically add the 'Print' menuitem to the top ace:menubar. When the page is first rendered, we have the following rendered out for the menuitem:

<a onclick="showProcessingMessage('Menu Action');;ice.ace.ab({source:'menuForm:screen1Child2',process:'@all',update:'@all',params:{'ice.customUpdate':'menuForm:screen1Child2'}});" href="#" class="wijmo-wijmenu-link ui-corner-all"><span class="wijmo-wijmenu-text"><span class="wijmo-wijmenu-text">Add Pring Menu Item</span></span></a>

Once the menuitem is selected and the ace:menubar model is changed, the same menuitem renders out like this:

<a onclick="showProcessingMessage('Menu Action');;ice.ace.ab({source:'screen1Child2',process:'@all',update:'@all',params:{'ice.customUpdate':'screen1Child2'}});" href="#" class="wijmo-wijmenu-link ui-corner-all"><span class="wijmo-wijmenu-text"><span class="wijmo-wijmenu-text">Add Pring Menu Item</span></span></a>

The id's have changed, they no longer have the form id prepended. The result is that pressing a menuitem with the new id's after the dynamic update, you do not get the the appropriate response from the server.