ScrollToIndex just won't work ... any workarounds ?

Hello,
Any ideas why scrollToIndex won't work ? Tried it on a
tilelist,
datagrid, ... all without any result. Not even an error
message !
This works, as the last item is selected in the tilelist:
tlProductsSearchResults.selectedIndex =
tlProductsSearchResults.dataProvider.length - 1;
But this one doesn't do a thing:
tlProductsSearchResults.scrollToIndex(tlProductsSearchResults.dataProvider.lengt\
h
- 1);
Best regards,
Frank

found a solution !
Had to add "dg.validateNow();"
blog-example

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