Instead of landing on the first page after scrollLoop as expected, you
will have an empty page. Try to swipe to previous page and you'll get an
1670920 playground.Application[18-0]: GlobalError: Error in property
currentIndex of class qx.ui.mobile.container.Carousel in method
setCurrentIndex with incoming value 'null': Null value is not allowed!
if you executing nextPage in timeout it works as expected: