Human resources will never ever give you any sort of clue about why they make their decision. Doesn’t matter if you marched in there naked with a swastika tattoo on your forehead. Giving people information just sets them up for lawsuits.

But I think everyone is operating with a logical fallacy here that if you do great on the technical interview you will move forward to the next step. They may well have offered 100 technical interviews for 20 slots.