Flickable in front of a touch-only component doesn't work

Scenario: You have a Flickable in front of[1] a touch-only component such as a MultiPointTouchArea (see attachment)

Steps:
1 - flick vertically with touch
2 - while the Flickable is still moving repeat step 1.

Expected outcome:
Flickable continues moving

Actual outcome:
Flickable suddenly halts and the MultiPointTouchArea get those touch events instead. After this point, MultiPointTouchArea will get all input events.

This problem doesn't happen if you use a mouse instead of a touchscreen and it also doesn't happen if you wait until Flickable stops moving to perform that second flick.

[1] - same position and size but with a bigger Z.