ListView.verticalVelocity and horizontalVelocity have a 0 value every other value change when using index based scrolling

With a ListView (which is a Flickable) one can trigger the 'flick' using keynavigation or setting the currentIndex

This (might) triggers a flick/scroll on the Flickable.
The resulting verticalVelocity and horizontalVelocity will jump back and forth between the actual value and 0.

This makes it impossible to use SmoothedAnimation on for values based on this value.

A work-around is as welcome as a fix

See attachment to reproduce.
key-navigation will trigger the problem, mouse-flicking not.
currentIndex changes will also trigger to problem