I am experiencing a problem where the background of the y-axis in my Gantt chart becomes transparent when I add a scrollbar for the x-axis. The y-axis should have a solid background color, but it disappears along with some stylings and shows the background of the chart behind it.
I have tried adjusting the code and settings for the chart, but I can't seem to find a solution to this problem. I need the y-axis to have a solid background color, even when a scrollbar is added to the x-axis. Here is an example: