Good morning,
Using a windows 10 tablet device with google chrome, in your's ribbon demo website (http://js.syncfusion.com/demos/web/#!/azure/ribbon/defaultfunctionalities) when we click on the pushpin toggle button it does a wrong behaviour hidding the ribbon's buttons area.
If you press the pushpin button slightly under itself, it works find.
This wrong behaviour only happens in chrome, in Internet Explorer works find.
Regards