When dragging over input box, number is changed as if dragging over slider.

[e-motiv]

When you want to change the number by inputting another number in the input field (nextto the slider), and you select the number to be able to type over it (by dragging the mouse over it, as is custom for selecting text), the number changes because your mouse moves during selecting, just as if the drag area of the slider extends over the input box too.