Vertices of BoundingBox

Hi! I have problems using the BoundingBox.ByGeometry node for a certain geometry. It is supposed that the node gives me the vertices of the limits (x, y, z) of the geometry, but in this case in particular, the vertices of the boundingbox of the geometry are outer of the solid geometry. Does anybody has the same problem?

In the image the points are the vertices of the boundingbox of that vault but the real ones are supposed to be in contact with the geometry.

Can you supply the geometry and resulting bounding box in question? Use of a data.remember node from the generative design package and then saving the graph should suffice - no need for the full graph or Revit model (the rest can be deleted after you save the graph with the remembered data).