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I've nested a SlideView(Horizontal) inside a SlideView(Vertical) with a PanZoomImage, all of this is passing through ItemTemplateSelector's and on initial load its totally blank. It behaves as though the images are loaded but they don't actually display until they've been transitioned (horizontally) several times. This is just a repro, in my actual case the items seem to show most of the time, but the nested SlideView (Vertical) doesn't appear to be responding to user input.
https://gist.github.com/hippiehunter/4448eaf440c1fae3bbbd
https://gist.github.com/hippiehunter/e325e76f2573708b96bf
https://gist.github.com/hippiehunter/4448eaf440c1fae3bbbd
https://gist.github.com/hippiehunter/e325e76f2573708b96bf