of course, I can not certify this anymore because I do not have v6.11 anymore.
But I’m sure there is a difference between v6.11 and v6.12.
In December (with v6.11) I work in the same project and the same file as today (with v6.12).
Model a big city, and in December I had no problem with the shell command on this volume (in red in the picture).