Cell and point selection does not work in CMB on SMTK file

Hi,

I would like to select cells or points in a discrete model imported into CMB. As an example, I considered the knee.smtk file shipped with CMB. I open it in CMB. I can select blocks with the “Select Block” command, but not cells or points with “Select Cells With Polygon”, “Select Points With Polygon”, etc. If I open the knee.ex2 file (since this is not an SMTK file, it does not appear in the Resources panel) in CMB, the cell and point selection tools work.

Is this is an intended behavior or a bug?

CMB discourse is here: https://discourse.kitware.com/c/cmb/7

OK, posted my question there.