In Bonsai, assigning a HEB 160 steel profile to a structural beam deletes the beam's edge topology and replaces it with an extrusion of depth 0 and an axis from (0,0,0) to (0,0,0). The member length and both endpoint positions are no longer represented anywhere in the file, though the connections and material survive. It was fixed in the Oct 27 build and came back on Oct 31.