Ant-Design table column header autoscroll is not working on table header

[galaburdaEndermen]

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For some reason auto scroll on column drag works only when the cursor is on the table data left or right edge, but not when it is on the header row edge. Here is an image example: (Green is where auto-scroll works and red is where it is not)

here is a little code sample: https://codepen.io/Anton-Halaburda/pen/gOBapwg

[ronak-betaflux]

For me, the scrolling rarely works with antd table.