Long Running Operation does not show standard Popup Status

Sure, its in progress so it still needs some work but I hope it helps.

Please note the PX1008 suppression

[PXLocalizable]
    public sealed class ProjectEntry_Extension : PXGraphExtension<ProjectEntry>
    {
        public static bool IsActive() => (true);


        public PXAction<PMProject> InvoiceAllowances;
        [PXProcessButton]
        [PXUIField(DisplayName = "Invoice Allowances")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Default", "PX1008:The reference to {0} is captured in the {1} delegate and will cause synchronous execution of the delegate. It may lead to random bugs and data consistency issues.", Justification = "<Pending>")]
        protected IEnumerable invoiceAllowances(PXAdapter adapter)
        {
            Base.Save.Press();
            int? projectID = Base.Project.Current.ContractID;
            PXLongOperation.StartOperation(Base, delegate
            {
                ProjectEntry prjGraph = PXGraph.CreateInstance<ProjectEntry>();

                PMProject prj = prjGraph.Project.Current = PMProject.PK.Find(prjGraph, projectID);
                PMProject_Ext prjExt = prj.GetExtension<PMProject_Ext>();

                var selectOrderItems = new SelectFrom<GPPMProjectOrderItem>.
                    Where<GPPMProjectOrderItem.projectOrderSetID.IsEqual<PMProject_Ext.usrCurrentOrderSetID.FromCurrent>
                    >.View(prjGraph);

                var orderItems = new List<GPPMProjectOrderItem>(selectOrderItems.Select().RowCast<GPPMProjectOrderItem>());

                var tasks = new List<PMTask>(prjGraph.Tasks.Select().RowCast<PMTask>());

                foreach (var task in tasks)
                {
                    if (task.CompletedPercent > 0)
                    {

                        PMTask_Ext taskEx = task.GetExtension<PMTask_Ext>();
                        List<GPPMProjectOrderItem> taskOrderItems;
                        taskOrderItems = getTaskOrderItems(prjGraph, task, orderItems);


                        if (taskEx.UsrAllowancesBatchNbr == null)
                        {
                            autoT_EnterAllowanceExpenseOffsets(prj, task, taskOrderItems);
                        }
                    }
                }
                prjGraph.Actions.PressSave();

            });
            return adapter.Get();
        }
        private static void autoT_EnterAllowanceExpenseOffsets(ProjectEntry prjGraph, PMProject prj, PMTask task, List<GPPMProjectOrderItem> taskOrderItems)
        {


            var GLTrans = new List<taskAllowanceGLTranPrams>();

            var ExpenseOffset = "700";

            var toolNetAllowance = taskOrderItems.FindAll(i => isToolCharge(i)).Sum(x => x.UnitCost * x.Quantity) ?? 0;
            if (toolNetAllowance != 0)
                GLTrans.Add(new taskAllowanceGLTranPrams() { amount = toolNetAllowance, description = "Tool Allowances", debitAccount = "508", creditAccount = ExpenseOffset });

            var equipNetAllowance = taskOrderItems.FindAll(i => isEquipCharge(i)).Sum(x => x.UnitCost * x.Quantity) ?? 0;
            if (equipNetAllowance != 0)
                GLTrans.Add(new taskAllowanceGLTranPrams() { amount = equipNetAllowance, description = "Equipment Allowances", debitAccount = "506", creditAccount = ExpenseOffset });


            var workNetAllowance = taskOrderItems.FindAll(i => isWork(i)).Sum(x => x.UnitCost * x.Quantity) ?? 0;
            if (workNetAllowance != 0)
            {
                decimal laborMultipler = (decimal)(1 / 1.41321);
                decimal burdenMultipler = 1 - laborMultipler;
                workNetAllowance = workNetAllowance * burdenMultipler;
                GLTrans.Add(new taskAllowanceGLTranPrams() { amount = workNetAllowance, description = "Burden Allowances", debitAccount = "510", creditAccount = ExpenseOffset });
            }

            var contingkNetAllowance = taskOrderItems.FindAll(i => isContingCharge(i)).Sum(x => x.UnitCost * x.Quantity) ?? 0;
            if (contingkNetAllowance != 0)
                GLTrans.Add(new taskAllowanceGLTranPrams() { amount = contingkNetAllowance, description = "Contingency Allowances", debitAccount = "512", creditAccount = ExpenseOffset });

            var otherNetAllowance = taskOrderItems.FindAll(i => isOtherCharge(i)).Sum(x => x.UnitCost * x.Quantity) ?? 0;
            if (otherNetAllowance != 0)
                GLTrans.Add(new taskAllowanceGLTranPrams() { amount = otherNetAllowance, description = "Other Allowances", debitAccount = "514", creditAccount = ExpenseOffset });


            var prjExt = (PMProject_Ext)prj.GetExtension<PMProject_Ext>();
            var os = GPPMProjectOrderSet.PK.Find(prjGraph, (int)prjExt.UsrIntialOrderSetID);
            var orderSet = os.Description ?? prjExt.UsrIntialOrderSetID.ToString() ?? "?";
            var batchDescription = $"Generated Project Allowance Expenses. Project: {prj.ContractCD}  Task: {task.TaskCD.Trim()}  OS: {orderSet}";

            if (GLTrans.Count > 0)
                createJournalTransactionForAllowances(prjGraph, 3, batchDescription, prj, task, GLTrans);

        }



        #region GL Entry
        private class taskAllowanceGLTranPrams
        {
            public string description { get; set; }
            public string creditAccount { get; set; }
            public int? creditAccountID { get; set; }
            public string debitAccount { get; set; }
            public int? debitAccountID { get; set; }
            public decimal amount { get; set; }

        }
        private static void createJournalTransactionForAllowances(ProjectEntry prjGraph, int branch, string batchDescription, PMProject prj, PMTask task, List<taskAllowanceGLTranPrams> entries)
        {
            GL.JournalEntry glGraph = PXGraph.CreateInstance<GL.JournalEntry>();

            var prj_Ext = (PMProject_Ext)prj.GetExtension<PMProject_Ext>();
            var b = new Batch()
            {
                Description = batchDescription
            };
            b = glGraph.BatchModule.Insert(b);


            var actsSelect = new SelectFrom<GL.Account>.Where<GL.Account.accountCD.IsEqual<@P.AsString>>.View(prjGraph);
            var equipExp540Act = actsSelect.Select("540").TopFirst;
            var equipAsset175Act = actsSelect.Select("175").TopFirst;

            foreach (var e in entries)
            {
                if (e.creditAccountID == null)
                    e.creditAccountID = actsSelect.Select(e.creditAccount).TopFirst.AccountID;

                if (e.debitAccountID == null)
                    e.debitAccountID = actsSelect.Select(e.debitAccount).TopFirst.AccountID;
            }

            foreach (var e in entries)
            {
                glGraph.GLTranModuleBatNbr.Insert(new GLTran()
                {
                    BranchID = branch,
                    AccountID = e.debitAccountID,
                    TranDesc = e.description,
                    ProjectID = task.ProjectID,
                    TaskID = task.TaskID,
                    CuryDebitAmt = e.amount
                });


                glGraph.GLTranModuleBatNbr.Insert(new GLTran()
                {
                    BranchID = branch,
                    AccountID = e.creditAccountID,
                    TranDesc = e.description,
                    //ProjectID = task.ProjectID,
                    //TaskID = task.TaskID,
                    CuryCreditAmt = e.amount
                });
            }


            glGraph.Save.Press();

            var tskExt = task.GetExtension<PMTask_Ext>();

            tskExt.UsrAllowancesBatchNbr = glGraph.BatchModule.Current.BatchNbr;
            prjGraph.Tasks.Update(task);

        }
        #endregion