Range Selection - When scroll fast, the blue focus-selection will not be shown for enddate

[wxu-aa]

Hey bro, found one small issue for Range Selection,

http://clauderic.github.io/react-infinite-calendar/#/enhance-default-functionality/range-selection?_k=1j53e5

Click on the start date, and scroll down to few months later quickly, you will found when it stoped, the blue focus selection is not shown. And if you move mouse now, then the blue focus-selection will be shown. But if you scroll down slowly, then the blue focus-selection would always be shown.

On the screenshot below, here we should see the blue focus-selection following the mouse cursor but we can't. Only if we move the mouse cursor then we get the focus-selection.