Please take note, This only affects Child prims. (i discovered my other issue (SVC-1680) only affects child prims also) Create a hollow sphere (e.g. 5x5x5) make it transparent so you can see. Link it to another prim so the sphere is not the root. Create a small physical sphere and move it into the larger sphere. It will fall to the bottom of the hollow sphere. No problem. Edit Linked Object on the large sphere. Put hollow to 0%. Small sphere is NOT ejected! Simulator still thinks large sphere is hollow. If you then Edit Linked object on the root prim of this set. It will then eject the small sphere. U can also do the opposite. (start with unhollow sphere and change to hollow) Works with dimple, twist,and hollow shape! Simulator not recognizing new shape until Size, rotation,or postion of child object changed (using Edit Linked Parts) Size of entire object changed. (But not Postion or Rotation). Looks like a problem at a lower level probably related to many other issues.