Sticky flags do not work correctly with multi touch because touches get sorted to elements before gestures get tested. This happens to allow e.g. multiple simultaneous motion gestures on separate nodes. A two point rotation does not work correctly because once a finger moves away from the element, the gesture gets tested with just one remaining input point and this does not validate as a rotation. For sticky for multi touch to work, we'd need to check for gestures on the global input state, but other issues pop up.
e.g.
Sticky flags do not work correctly with multi touch because touches get sorted to elements before gestures get tested. This happens to allow e.g. multiple simultaneous motion gestures on separate nodes. A two point rotation does not work correctly because once a finger moves away from the element, the gesture gets tested with just one remaining input point and this does not validate as a rotation. For sticky for multi touch to work, we'd need to check for gestures on the global input state, but other issues pop up.
e.g.