- fix sudden customer reported possible data/calculation fault ✅/ #enocpop

- fix the server hang issue and give Siti a separate way to print incentives ✅ #enocpop

#enocpop 🇸🇬📬 - ⭐ 🧪 test the latest 2 changes for issue MTT-513 (2/6) => (4/6) for 1pm ✅