It's more about trying to be "expert" with my 3d navigator. For instance, using the curve tool, then drawing and rotating around the sphere for various pick points! Using my spacenavigator at the same time as drawing and constructing, with 2 hands, in the 3d viewport...

But it is a bit unconventional, and not a normal workflow for me. Hence I didnt want to push for totally figuring it out. I was looking to see if it was a simple explanation found with some understanding of the underlying process.

It may very well be limited to "only my system", in which case, a bunch of time doesnt need to be wasted on why, what etc. on your end.