diff --git a/src/app/modules/angular-slickgrid/services/__tests__/groupingAndColspan.service.spec.ts b/src/app/modules/angular-slickgrid/services/__tests__/groupingAndColspan.service.spec.ts
index ef88d8e3a..b257ef282 100644
--- a/src/app/modules/angular-slickgrid/services/__tests__/groupingAndColspan.service.spec.ts
+++ b/src/app/modules/angular-slickgrid/services/__tests__/groupingAndColspan.service.spec.ts
@@ -37,6 +37,7 @@ const gridStub = {
   getSortColumns: jest.fn(),
   invalidate: jest.fn(),
   onColumnsResized: new Slick.Event(),
+  onColumnsReordered: new Slick.Event(),
   onSort: new Slick.Event(),
   render: jest.fn(),
   setColumns: jest.fn(),
@@ -184,6 +185,18 @@ describe('GroupingAndColspanService', () => {
       expect(setTimeout).toHaveBeenLastCalledWith(expect.any(Function), 50);
     });
 
+    it('should call the "renderPreHeaderRowGroupingTitles" after triggering a grid "onColumnsReordered"', () => {
+      const spy = jest.spyOn(service, 'renderPreHeaderRowGroupingTitles');
+
+      service.init(gridStub, dataViewStub);
+      gridStub.onColumnsReordered.notify({}, new Slick.EventData(), gridStub);
+      jest.runAllTimers(); // fast-forward timer
+
+      expect(spy).toHaveBeenCalledTimes(2);
+      expect(setTimeout).toHaveBeenCalledTimes(1);
+      expect(setTimeout).toHaveBeenLastCalledWith(expect.any(Function), 50);
+    });
+
     it('should call the "renderPreHeaderRowGroupingTitles" after triggering a dataView "onColumnsResized"', () => {
       const spy = jest.spyOn(service, 'renderPreHeaderRowGroupingTitles');
 
diff --git a/src/app/modules/angular-slickgrid/services/groupingAndColspan.service.ts b/src/app/modules/angular-slickgrid/services/groupingAndColspan.service.ts
index 85c7a9644..dbc20498b 100644
--- a/src/app/modules/angular-slickgrid/services/groupingAndColspan.service.ts
+++ b/src/app/modules/angular-slickgrid/services/groupingAndColspan.service.ts
@@ -44,6 +44,7 @@ export class GroupingAndColspanService {
         // on all following events, call the
         this._eventHandler.subscribe(grid.onSort, () => this.renderPreHeaderRowGroupingTitles());
         this._eventHandler.subscribe(grid.onColumnsResized, () => this.renderPreHeaderRowGroupingTitles());
+        this._eventHandler.subscribe(grid.onColumnsReordered, () => this.renderPreHeaderRowGroupingTitles());
         this._eventHandler.subscribe(dataView.onRowCountChanged, () => this.renderPreHeaderRowGroupingTitles());
         this.resizerService.onGridAfterResize.subscribe(() => this.renderPreHeaderRowGroupingTitles());