Hierarchical Grids samples for WebC: https://www.infragistics.com/products/ignite-ui-web-components/web-components/components/grids/hierarchical-grid/cell-merging#web-components-hierarchical-grid-cell-merging-example React: https://www.infragistics.com/products/ignite-ui-react/react/components/grids/hierarchical-grid/cell-merging#react-hierarchical-grid-cell-merging-example Show that the bottom child grid has no data <img width="1152" height="738" alt="Image" src="https://github.com/user-attachments/assets/abed6276-5c2a-4a15-a2a4-621f7c228ccc" />
