diff --git a/projects/igniteui-angular/grids/core/src/api.service.ts b/projects/igniteui-angular/grids/core/src/api.service.ts
index 5d918de1a50..b1ed4e2b39a 100644
--- a/projects/igniteui-angular/grids/core/src/api.service.ts
+++ b/projects/igniteui-angular/grids/core/src/api.service.ts
@@ -320,8 +320,8 @@ export class GridBaseAPIService<T extends GridType> implements GridServiceType {
             const transaction: Transaction = { id: rowId, type: TransactionType.ADD, newValue: rowData };
             grid.transactions.add(transaction);
         } else {
-            grid.data.push(rowData);
-            grid.data = cloneArray(grid.data);
+            (grid.data ?? (grid.data = [])).push(rowData);
+            grid.summaryService.clearSummaryCache();
         }
         grid.validation.markAsTouched(rowId);
         grid.validation.update(rowId, rowData);
@@ -336,8 +336,8 @@ export class GridBaseAPIService<T extends GridType> implements GridServiceType {
                 const transaction: Transaction = { id: rowID, type: TransactionType.DELETE, newValue: null };
                 grid.transactions.add(transaction, grid.data[index]);
             } else {
-                grid.data.splice(index, 1);
-                grid.data = cloneArray(grid.data);
+                (grid.data ?? (grid.data = [])).splice(index, 1);
+                grid.summaryService.clearSummaryCache();
             }
         } else {
             const state: State = grid.transactions.getState(rowID);
diff --git a/projects/igniteui-angular/grids/core/src/common/pipes.ts b/projects/igniteui-angular/grids/core/src/common/pipes.ts
index 9a7d14242fa..734a0d3be7d 100644
--- a/projects/igniteui-angular/grids/core/src/common/pipes.ts
+++ b/projects/igniteui-angular/grids/core/src/common/pipes.ts
@@ -248,7 +248,10 @@ export class IgxGridTransactionPipe implements PipeTransform {
                 this.grid.dataCloneStrategy);
             return result;
         }
-        return collection;
+        // Return a shallow copy so downstream pipes and igxGridForOf always
+        // receive a new array reference when pipeTrigger changes, regardless
+        // of whether the source array was mutated in place.
+        return cloneArray(collection);
     }
 }