First, thank you for taking the time to work on this as it is sorely needed to void having to switch out Touch/HTML5 backends dynamically.
I am testing with iOS 10 and an iPhone 6 and https://github.com/yahoo/react-dnd-touch-backend enabled touch support. However, I'm not getting any touch interaction in iOS with your hybrid library. The Html5 backend does seem to work on the browser, however.