ProBuilder has poor construction tolerance on large scale project

I have noticed that when building larger projects in ProBuilder the construction tolerance is not great. A simple plane is not completely level, though the rotation shows no tilt. I checked that the walls are of equal height, and the bottom edge is at zero, along with the plane, but clearly it is not. I have included a couple of images here for you to see. This is the same room, different sides - about 30 meters across the room from each other.

I have also noted that after creating many extrusions, some extrusions along some planes are not extruding exactly along their normals, but at slight angles. Now that I know this, I sometimes catch it, and can correct the angle, but at times, I have noted the error after much building.

I suppose I should just use another 3d program (Blender), but ProBuilder is very much more intuitive and nice to build with (when it behaves itself).

I am wondering if anyone else has noticed this issue. On DIscord, I mentioned this, but most people don't do large-scale builds with it, or are probably not concerned with a truly accurate build since it is technically a prototyping tool.


Unity 2019.4 LTS, ProBuilder 4.3.1, ProGrids 3.0.3 preview.6