Ninja Character - Dynamic gravity for characters & objects

I didn’t see this mentioned in the thread but it looks like physics isn’t imparted to actors all the time. For example, if you go into the playground at the end of the example map and orient yourself so you and your gravity is perpendicular to one of the sets of 3 cubes of descending size and then jump into the smallest one, it doesn’t move at all. If you go back so you’re on the same plane as the cubes, you can run into them and they move just fine. Is this a bug, a limitation or just something that needs to be configured differently?