Sorry for the inconveniences.
Due to some complexities in virtual scrolling support in Gantt, we could not include this support in our Volume 4 release. We have already lined up with some major features which are planned for the roadmap 2020. Hence, we could not start this feature immediately. We will include this support in any our upcoming releases. You can track its status from feedback link shared in the previous update.
Until then we appreciate your patience.