I upgraded to the latest monogame runtime. I have a few special mods that I merge in dealing with loading files, but otherwise nothing else is changed from the release version.
 
Is there something I need to do other then pass "Physics.Update" to the Skeleton.UpdateWorldTransform?
I do not see any Physics in the animation in my Monogame App.  The Skeleton Viewer properly displays the Physics elements, but not for my App.  So either I missed something in the merge, or simply don't understand something.