Progressive Web Apps - onpulltorefresh acton/event

Has anyone had any success with the onpulltorefresh in a PWA.  It looks like it isn't triggered based on our simple app build.

Just got the 11.9 update in a Personal Environment and still not seeing the onpulltorefresh being triggered.


please check this example from the forge.



What is behind using a custom component rather than the out of the box events? are we acknowledging that teh out of the box doesn't work?