QDial is extremely unresponsive on Android

QDial is very unresponsive on Android.

On touch, it reacts in reasonable time (less than one second). But if you try to turn the QDial with your finger, dragging your finger over the screen, it only reacts after removing the finger from the screen, not while dragging.

When turning the QDial a lot, it even takes a few seconds until it reacts at all, even after removing the finger.

To reproduce, just create an empty project, add a QDial and a progressbar, connect QDial's "valueChanged" signal with the "setValue" slot of the progressbar. Or use the project attached.