Wall's not joining

I made a wall style that is 1.5" tall to simulate the sill plate of a stud framed wall, but for some reason it is not joining at the ends. When I increase the wall height it joins, but won’t join when I reduce it down again. It appears to be some sort of bug. Is there a way to fix it? Thanks!

Hi Sam, if you select those walls and run the vaUpdate command, do the joins fix? In any case, please send us that 3dm file (visualarq@asuni.com). We will check it out, and fix any possible bugs.