This is ridiculous. According to their resume they lived, studied, and worked in Poland for over 10 years and don't speak Polish? This isn't considered a red flag? This was a screening call and the head of operations categorically failed.
>Communication was a bit choppy, and the candidate did not speak Serbian, despite graduating from the University of Kragujevac, in Serbia. Once again, they sounded motivated, so proceeded to the next round.
So no actual lessons learned from the last time.