Issue with Grid Chart / Vizlib

The feature that we would like to have in the Vizlib Grid chart is shown in the attached. PFA.

In the charts, there is only one box with orange color, that is 2021-53 week /Thursday. When we click on that box, the color remains the same for heatmap but changes for the Grid chart, which is a problem for us. We would expect the color to remain the same in the Grid chart too.

What we have used in heatmap to keep the color is under Heatmap Settings à Fixed Scale (min scale=0 / max scale= 1). The fixed scale option is not there in the Grid chart. So we would like to have that option in there as well, because then the color should not change, but remain orange.