This didn't happen at my table (my partner and I played a normal-looking 4♥S), but at one of the comparison tables. South was the only non-robot. The XX is described as 20+ total pts.
4♥x-8 was -2000.
What was the worst robot call? I don't like any of East Robot's actions, but I think the final pass is probably the most egregious.
(Let's not pile on South; whatever you may think of their choices, they worked.)