While evaluating GoJS i was using 1.7.26.
I just activated my license, downloaded the customized GoJS download - which happens to be 1.7.28
With the same code base -
in 1.7.26 when i did diagram.layoutDiagram(true); - it re-jigged my diagram with nice smooth animations
in 1.7.28 the same code base, the layoutDiagram(true) does not animate to final layout - it just abruptly snaps to new layout.
Not sure if its a broken/bug 1.7.28 thing, or something to do with the customized download.