Unable to click on ListSelect scrollbar or controls

I just noticed that I cannot use the scrollbar with my mouse on a ListSelect component where there are more elements that they can be shown at once vertically.

Plainly speaking: if I click with my mouse on the scrollbar, it won’t do anything.
If I click on the scrollbar arrows, it won’t do anything.

But if I click on a element and move with the keyboard arrows, it will properly navigate between ListSelect elements.

Mouse scroll wheel works fine alse, though.

The control is enabled. If disabled or readonly, obviously I cannot click on an element and navigate with my keyboard, either.

I’m on v7.