WASM: Containers with draggable contents do not react on pointer events

A natively compiled version of a QML application with a container with draggable contents (i.e. a ListView) reacts on both, mouse and touch events for drag scrolling. The device I've tested on is a laptop that also has a touchable screen.

Problem:

If you compile to webassembly, the browser does react on tapping, but does not react on any drag scroll guesture on a touch enabled device. Only the mouse is working.

Expected:

Both, the native and the browser version behave in the same way.

Reproduce:

https://github.com/cajus/qt-wasm-bug-pointer

Build the application and try to scroll the list by dragging it's contents.