Horizontal scrolling in hourglass-chart broken/wrong focus?

[someone-somenet-org]

Arrow keys and dragging doesnt work horizontally, but vertically its fine for some reason.

You have to click into the pane or the scrollbar to be able to scroll with the arrow keys, it doesnt work with dragging.

Please consider to make the hourglass-chart full width and make the scrollbar react to dragging and arrow keys.