I wrote "Matej slyší moje medvědí" and it is marked as correct. According to this https://cs.wiktionary.org/wiki/medv%C4%9Bd the correct form for accusative plural of medvěd is medvědy, but i wrote medvědí. Is it a bug?
It is marked as a typo for me and that looks correct. Duolingo decides what is a typo automatically.