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Need to Improve Keyboard Scrolling in Virtualization

When the user scrolls using the keyboard down arrow key, the data in the Gantt Chart does not render properly under virtualization. This results in blank (white) spaces or incomplete data loading. We need to enhance the rendering behavior to ensure smooth and consistent data loading during keyboard-based scrolling. We have attached a sample and a video demonstration for reference.


Sample and video are attached in the zip file.


Expected result:


When scrolling using the keyboard, data should render seamlessly without white spaces or interruptions. The Gantt Chart should load and display data correctly as the user navigates down using the keyboard.