using (var txn = context.Database.BeginTransaction())
            {
                BISaveTransaction.CommitTransactions(context,rs);
                modulate();
                processTransactionHeader();
                processTransactionDetails();
                if (or.Success == false)
                {
                    Monitor.write($" ===>  Rolling back - {t.Document}" );
                    txn.Rollback();
                    return;
                }
                processRsHeaders();
                processEmHeaders();

                txn.Commit();
                th_Id = th.TransactionHeaders_Id;
            }

When or.Success returns false after process TransactionDetails, updates of OnHand fields of related tables are not rolled back.

Puzzled.