Vcl Styles issue for menu items added during program load

I have a Delphi 10.4.2 program (32-bit) where menu items are added during program load (the Application.OnActivate event, coded to run only once). Without a vcl style the new items are displayed correctly, however when a style is applied (such as the very nice Iceberg Classico in the screenshot) the display is not correct. The menu options are there, and can be clicked on; but the text and the icon are not drawn.

Any workrounds? I'm assuming that it’s because those particular menu options are added after the style is applied. Is there a way to refresh the style?, or am I missing a setup property when creating the menu items?

Thanks.

Edit: Yes, the 'File' menu and sub menu items are displayed correctly. Code that creates the new menu and items (simplified) is:

procedure TDbHelper.CreateHelpMenu;
// Called by OnApplicationActivated event, and run just once 
var
   aMenu: TMainMenu;
   mnHelp, mnItem: TMenuItem;
   idx: Integer;
begin
   aMenu := Application.MainForm.Menu;
   // create new menu
   mnHelp         := aMenu.CreateMenuItem;
   mnHelp.Name    := 'WISHelp1';               
   mnHelp.Caption := 'WIS Help';
   aMenu.Items.Add(mnHelp);
   // now the submenu items
   for idx := 0 to HelpLinks.Count - 1 do
   begin
      mnItem := TMenuItem.Create(mnHelp);
      mnItem.Name := HelpLinks[idx].Key;
      mnItem.Caption := HelpLinks[idx].Text;
      mnItem.ImageIndex := HelpLinks[idx].ImageIndex;                            
      mnItem.OnClick := WISHelpItemClick;
      mnHelp.Add(mnItem);
   end;
end;

Finally decided to switch off the vcl styles for the menus. I followed the advice of RRUZ on another question and added a line to the dpr source so that it became:

  Application.Initialize;
  TStyleManager.TrySetStyle('Iceberg Classico');
  with TStyleManager do SystemHooks := SystemHooks - [shMenus];
  Application.Title :=  'blah, blah, etc'

The menu items have re-appeared, and they look fine:

Thank you to SilverWarior for their input and suggestions.