diff --git a/apps/edr-freight-api/src/modules/train-schedules/train-schedules.repository.ts b/apps/edr-freight-api/src/modules/train-schedules/train-schedules.repository.ts
index 294fb93f1..b0cbeb886 100644
--- a/apps/edr-freight-api/src/modules/train-schedules/train-schedules.repository.ts
+++ b/apps/edr-freight-api/src/modules/train-schedules/train-schedules.repository.ts
@@ -39,7 +39,11 @@ export class TrainSchedulesRepository extends BaseRepository<TrainSchedule> {
             physicalWagon: true,
             allocations: {
               booking: { company: true, bookingContainers: { containerType: true } },
-              containerItems: true,
+              // Both size sources loaded: the item's own container_type_id FK
+              // (always set for a manually-entered item) and the booking-line
+              // fallback via bookingContainer.containerType — the marshalling
+              // document's 40ft/20ft tally reads whichever is present.
+              containerItems: { containerType: true, bookingContainer: { containerType: true } },
             },
           },
         },
diff --git a/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts b/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
index 599e1ed72..d75eadc4a 100644
--- a/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
+++ b/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
@@ -2801,6 +2801,32 @@ export class TrainSchedulingService {
     };
   }
 
+  /**
+   * A container item's size in feet, for the marshalling document's 40ft/20ft
+   * tally. Two independent sources, since only one is populated depending on
+   * how the item was created:
+   *  - `item.containerType` — the item's own container_type_id FK, set for
+   *    manually-entered items (no booking-container line behind them).
+   *  - `item.bookingContainer.containerType.sizeFt` / `.containerSize` — the
+   *    booking-line fallback for items generated from an allocation.
+   * (`findByIdWithFullGraph` must load both relations or every item here
+   * silently resolves to null and the tally stays zero.)
+   */
+  private resolveContainerItemSize(item: {
+    containerType?: { sizeFt?: number | null } | null;
+    bookingContainer?: {
+      containerSize?: string | null;
+      containerType?: { sizeFt?: number | null } | null;
+    } | null;
+  }): number | null {
+    const fromSizeFt = item.containerType?.sizeFt ?? item.bookingContainer?.containerType?.sizeFt;
+    if (fromSizeFt === 20 || fromSizeFt === 40) return fromSizeFt;
+    const label = item.bookingContainer?.containerSize;
+    if (label?.includes('40')) return 40;
+    if (label?.includes('20')) return 20;
+    return null;
+  }
+
   private buildExportLoadListHtml(schedule: TrainSchedule): string {
     const esc = (value: unknown) =>
       String(value ?? '-')
@@ -2870,9 +2896,9 @@ export class TrainSchedulingService {
     wagons.forEach((wagon) => {
       (wagon.allocations ?? []).forEach((allocation) => {
         (allocation.containerItems ?? []).forEach((item) => {
-          const size = item.bookingContainer?.containerSize;
-          if (size?.includes('40')) count40ft++;
-          else if (size?.includes('20')) count20ft++;
+          const size = this.resolveContainerItemSize(item);
+          if (size === 40) count40ft++;
+          else if (size === 20) count20ft++;
         });
       });
     });
@@ -3036,9 +3062,9 @@ export class TrainSchedulingService {
     loadList.wagons.forEach((wagon) => {
       wagon.allocations.forEach((allocation) => {
         (allocation.containerItems ?? []).forEach((item) => {
-          const size = item.bookingContainer?.containerSize;
-          if (size?.includes('40')) count40ft++;
-          else if (size?.includes('20')) count20ft++;
+          const size = this.resolveContainerItemSize(item);
+          if (size === 40) count40ft++;
+          else if (size === 20) count20ft++;
         });
       });
     });