Loft history bug

rhino 6, Mac os x 10.15.4
Version 6 (6.26.20147.06482, 2020-05-26)
still not working for me / with attached file
bug_loft_noHistory.3dm (93.0 KB)

Hello - I see this, thanks - still poking at it…
It looks like extrusion object edges are the problem, if you explode or ConvertExtrusion history works OK, here at least.