Yes that is a known bug, but I couldn't find what is wrong yet
There are quite some new tools currently but it's a pity the the Arch Schedule is not fully working yet (IFC schedule works?).
I am using and exploring FC for a few months intermittently and it seems promising to be developed as a BIM parametric tool (to enable calculation of properties in cladding as mentioned, door and window schedule e.g.?). I used Autocad quite sometime ago for and have not used Revit personally (other peoples in the team model some projects with it). FC emphasized it is still in development though it is quite usable in architectural modeling I found, one thing to note is that BIM chairman here indicates those commercial products would not like to work on IFC to make information fully exchangeable but FC may has this advantage!
However, I still have difficulties in finding documentation on FreeCAD on some fundamentals to comprehend its concept behind
(enable me feel fully control it and/or to move on to Python like I used LISP sometime ago - I do not know Python currently though (maybe it can help division in cladding, like tiling in Autocad). I simply haven't found details on e.g.-
- name, label, type, role... (so that I can know exactly how to set up the 'function'/'formula' in Arch Schedule)
- more 'advanced' information or properties organized in FC like what you mention ... Extrusion.Length1 * Array.NumberZ
- or just even freecad 'coordinate' / 'spatial' system and properties (local and global xyz?,normal etc.)
I am quite confused sometimes e.g. I change a placement in an object under a Arch Floor Object, it goes elsewhere 'uncontrollable'. I have a window eave on the facade and some time later the projection go in opposite direction when re-calculated (I force a 'normal' then it seems go right ). I have simple flat units (just organized simply in x,y,z planes only) then with mirror, clone or array of them to make a seemingly complex buildings (see dependency graph) but I dare not move the parts now