diff --git a/static/src/app/pos_loyalty_safe_coupon_patch.js b/static/src/app/pos_loyalty_safe_coupon_patch.js
index eed8858..a84a9bf 100644
--- a/static/src/app/pos_loyalty_safe_coupon_patch.js
+++ b/static/src/app/pos_loyalty_safe_coupon_patch.js
@@ -1,9 +1,39 @@
+/** @odoo-module **/
+
 import { PosOrder } from "@point_of_sale/app/models/pos_order";
 import OrderPaymentValidation from "@point_of_sale/app/utils/order_payment_validation";
 import { PosStore } from "@point_of_sale/app/services/pos_store";
 import { patch } from "@web/core/utils/patch";
 
+/**
+ * Helper: delete all reward lines in an order where reward_id or reward_id.program_id is missing.
+ * This prevents TypeError crashes when the core code accesses reward.program_id.xxx
+ * on lines whose loyalty program was archived, deleted, or not yet loaded into the POS cache.
+ */
+function purgeOrphanedRewardLines(order) {
+    if (!order || !order.lines) {
+        return;
+    }
+    const orphans = order.lines.filter(
+        (line) =>
+            line.is_reward_line &&
+            (!line.reward_id || !line.reward_id.program_id)
+    );
+    for (const line of orphans) {
+        try {
+            line.delete();
+        } catch (e) {
+            // Ignore deletion errors — the line may already be gone
+        }
+    }
+}
+
+// ─── PosOrder patches ─────────────────────────────────────────────────────────
+
 patch(PosOrder.prototype, {
+    /**
+     * getLoyaltyPoints reads coupon_id.id — guard against undefined coupon_id.
+     */
     getLoyaltyPoints() {
         const undefinedCouponLines = [];
         for (const line of this._get_reward_lines()) {
@@ -20,17 +50,27 @@ patch(PosOrder.prototype, {
             }
         }
     },
+
+    /**
+     * _updateRewardLines rebuilds reward lines — purge orphans before core touches them.
+     */
     _updateRewardLines() {
-        if (this.lines) {
-            const invalidRewardLines = this.lines.filter((line) => line.is_reward_line && (!line.reward_id || !line.reward_id.program_id));
-            for (const line of invalidRewardLines) {
-                line.delete();
-            }
-        }
+        purgeOrphanedRewardLines(this);
         return super._updateRewardLines(...arguments);
-    }
+    },
+
+    /**
+     * initState fires when an order is initialized (including from server restore).
+     * Schedule a purge on the next microtask so reactive relations are fully resolved first.
+     */
+    initState() {
+        super.initState(...arguments);
+        Promise.resolve().then(() => purgeOrphanedRewardLines(this));
+    },
 });
 
+// ─── OrderPaymentValidation patches ───────────────────────────────────────────
+
 patch(OrderPaymentValidation.prototype, {
     async validateOrder(isForceValidate) {
         const undefinedCouponLines = [];
@@ -47,11 +87,67 @@ patch(OrderPaymentValidation.prototype, {
                 line.coupon_id = undefined;
             }
         }
-    }
+    },
 });
 
+// ─── PosStore patches ─────────────────────────────────────────────────────────
+
 patch(PosStore.prototype, {
+    /**
+     * afterProcessServerData — earliest global hook after all records are loaded.
+     * Purge orphaned reward lines from ALL open orders.
+     */
+    async afterProcessServerData() {
+        for (const order of this.models["pos.order"].getAll()) {
+            purgeOrphanedRewardLines(order);
+        }
+        return await super.afterProcessServerData(...arguments);
+    },
+
+    /**
+     * updateRewards — called on every order-line change.
+     * Purge orphaned lines from the current order before loyalty recalculation.
+     */
+    updateRewards() {
+        const order = this.getOrder();
+        if (order) {
+            purgeOrphanedRewardLines(order);
+        }
+        return super.updateRewards(...arguments);
+    },
+
+    /**
+     * orderUpdateLoyaltyPrograms — called when switching tables or rescanning codes.
+     * This is the path triggered by "Check Table" → `setTableFromUi` → `updateOrder`.
+     */
+    async orderUpdateLoyaltyPrograms() {
+        const order = this.getOrder();
+        if (order) {
+            purgeOrphanedRewardLines(order);
+        }
+        return await super.orderUpdateLoyaltyPrograms(...arguments);
+    },
+
+    /**
+     * setTableFromUi — the exact entry point for the "Check Table → blank screen" crash.
+     * Purge ALL orders before switching so the target table's order is clean.
+     */
+    async setTableFromUi(table, orderUuid = null) {
+        for (const order of this.models["pos.order"].getAll()) {
+            purgeOrphanedRewardLines(order);
+        }
+        return await super.setTableFromUi(...arguments);
+    },
+
+    /**
+     * postProcessLoyalty — called when pushing/validating an order.
+     * Guards both reward.program_id === undefined AND coupon_id === undefined.
+     */
     async postProcessLoyalty(order) {
+        // Remove lines with missing program_id (core reads reward.program_id.id)
+        purgeOrphanedRewardLines(order);
+
+        // Also guard coupon_id=undefined (original safe_coupon behavior)
         const undefinedCouponLines = [];
         for (const line of order._get_reward_lines()) {
             if (!line.coupon_id) {
@@ -59,8 +155,8 @@ patch(PosStore.prototype, {
                 undefinedCouponLines.push(line);
             }
         }
-        
-        // Intercept data.call to strip out the dummy coupon data with key "0"
+
+        // Strip dummy coupon key "0" from confirm_coupon_programs calls
         const originalCall = this.data.call;
         this.data.call = function (model, method, args) {
             if (model === "pos.order" && method === "confirm_coupon_programs") {
@@ -71,7 +167,7 @@ patch(PosStore.prototype, {
             }
             return originalCall.apply(this, arguments);
         };
-        
+
         try {
             return await super.postProcessLoyalty(...arguments);
         } finally {
@@ -81,14 +177,4 @@ patch(PosStore.prototype, {
             }
         }
     },
-    async orderUpdateLoyaltyPrograms() {
-        const order = this.getOrder();
-        if (order && order.lines) {
-            const invalidRewardLines = order.lines.filter((line) => line.is_reward_line && (!line.reward_id || !line.reward_id.program_id));
-            for (const line of invalidRewardLines) {
-                line.delete();
-            }
-        }
-        return await super.orderUpdateLoyaltyPrograms(...arguments);
-    }
 });