No one here doubts you, but you’ve already provided your own answer: no one understands the algorithm. Take a look at this topic. People have been trying to understand how the new (boost) algorithm works for year.
However, you will also find some answers there that will probably affect you, so make sure you read through this:
“…encourage and reward designers who dedicate much effort to create intricate, technically advanced 3D models that push the boundaries of what’s possible”
At that time, the entire algorithm was turned upside down, and to this day, no one knows how complex models are given preference and 2D models are made less visible. That will answer exactly why, but not how…