3D tiles bounding volumes don't move with tileset modelMatrix

With the chappes church point cloud model:

chappes.readyPromise.then(function() {
    var cartographic = Cartographic.fromCartesian(chappes.boundingSphere.center);
    var surface = Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, 0.0);
    var offset = Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, 415.49299710114906); //2.9262921309980063, 46.388339804887515, 415.49299710114906
    var translation = Cartesian3.subtract(offset, surface, new Cartesian3());
    chappes.modelMatrix = Matrix4.fromTranslation(translation);
});
camera.flyTo({
    destination: new Cartesian3(4401822.465194312, 225035.28458448383, 4595539.250208599),
    orientation: {
            heading: 5.404892352900644,
            pitch: -1.4530591151917136,
            roll: 6.260800942147647
    }
})

[cesium-concierge]

Congratulations on closing the issue! I found these Cesium forum links in the comments above:

https://groups.google.com/forum/#!topic/cesium-dev/OIP2B_UgGns https://groups.google.com/forum/#!topic/cesium-dev/rUFnzb0d14o https://groups.google.com/forum/#!topic/cesium-dev/j-8uQL0lJTo https://groups.google.com/forum/#!topic/cesium-dev/DE_iV6WAZcs

If this issue affects any of these threads, please post a comment like the following:

The issue at https://github.com/AnalyticalGraphicsInc/cesium/issues/5984 has just been closed and may resolve your issue. Look for the change in the next stable release of Cesium or get it now in the master branch on GitHub https://github.com/AnalyticalGraphicsInc/cesium.

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[lilleyse]

Another forum post: https://groups.google.com/forum/#!topic/cesium-dev/DE_iV6WAZcs

I submitted a PR to fix this, if we decide to allow transforms to move regions. https://github.com/AnalyticalGraphicsInc/cesium/pull/6755