chore: update changelog

Author: yordan-st

packages/pluggableWidgets/datagrid-web/CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+### Fixed
+
+- We fixed an issue where virtual scrolling prevented data loading when the grid had many columns, showing only the initial page of rows until the user performed a horizontal scroll or zoom.
+
 ## [3.9.0] - 2026-03-23
 
 ### Changed

packages/pluggableWidgets/datagrid-web/src/model/hooks/useInfiniteControl.tsx

@@ -42,7 +42,17 @@ export function useInfiniteControl(): [trackBodyScrolling: ((e: any) => void) |
     );
 
     useEffect(() => {
-        const timer = setTimeout(() => isVisible && gridSizeStore.lockGridBodyHeight(), 100);
+        const timer = setTimeout(() => {
+            if (!isVisible) {
+                return;
+            }
+            gridSizeStore.lockGridBodyHeight();
+
+            const gridBody = gridSizeStore.gridBodyRef.current;
+            if (gridBody && gridSizeStore.hasMoreItems && gridBody.scrollHeight <= gridBody.clientHeight) {
+                gridSizeStore.bumpPage();
+            }
+        }, 100);
         return () => clearTimeout(timer);
     });
 

packages/pluggableWidgets/datagrid-web/src/model/stores/GridSize.store.ts

@@ -122,17 +122,19 @@ export class GridSizeStore {
         const viewportHeight = this.computeBodyViewport();
 
         // Don't lock height before the grid body has rendered content.
-        // clientHeight is 0 when the element has no layout yet, which would
+        // viewportHeight is 0 when cells have no layout yet, which would
         // produce a negative height and break scrolling.
         if (viewportHeight <= 0) {
             return;
         }
 
-        // If content already overflows the container (fixed-height grid), do not subtract the
-        // pre-fetch offset — that would hide the last rows and trigger the next page too early.
-        // Only subtract the offset when the grid does not yet overflow (auto-height grid) so
-        // that we create a small synthetic overflow that makes the body scrollable.
-        const overflows = gridBody.scrollHeight > viewportHeight;
+        // Compare scrollHeight and clientHeight from the same element to correctly
+        // detect whether content already overflows a fixed-height container.
+        // If it does, do not subtract the pre-fetch offset — that would hide the
+        // last rows and trigger the next page too early. Only subtract when the
+        // grid does not yet overflow (auto-height grid) to create a small synthetic
+        // overflow that makes the body scrollable.
+        const overflows = gridBody.scrollHeight > gridBody.clientHeight;
         this.gridBodyHeight = viewportHeight - (overflows ? 0 : VIRTUAL_SCROLLING_OFFSET);
         this.lockedAtPageSize = currentPageSize;
     }