Action Override not firing after migrating from 2020R1 to 2021R2

I am upgrading a project from 2020R1 to 2021R2.

In my SOOrderEntry extension, the Override on the actions is not firing.  I know the extension is firing because other code gets hit on a breakpoint.

The action I am overriding is the Create Shipment item.  This is what it looks like in the 2020R1:

This is what it looks like in 2021R2.  The Create Shipment button is displayed in the menu bar and it is not selected from a drop down list.

I am thinking this may be the reason why my override does not fire.  

This is the extension

    public class SOOrderEntrySSGExt : PXGraphExtension<SOOrderEntry>
    {
 

This ActionDelegate signature changed.  The only thing I changed to make it compile successfully is that I changed siteCD to siteID in the signature.

        #region Overridden Methods
        public delegate IEnumerable ActionDelegate(PXAdapter adapter, Nullable<Int32> actionID, Nullable<DateTime> shipDate, Nullable<Int32> siteID, String operation, String ActionDelegateName);
        [PXOverride]
        //Previous baseMethod(adapter, actionID, shipDate, siteCD, operation, ActionName);
        public IEnumerable Action(PXAdapter adapter, Nullable<Int32> actionID, Nullable<DateTime> shipDate, Nullable<Int32> siteID, String operation, String ActionName, ActionDelegate baseMethod)
        {
 

When I put a breakpoint on this it does not fire.  Does anyone have any ideas why?

With this new “menu”, do I need to be overriding some other method?

Thanks,

Joe