There is no bug in the rules. Czech Checkers is just a variant played in our country and the rules details had been consulted with top Czech Checkers players.
From Checkers rules:
"If the player has more possibilities to capture opponent's pieces, he/she can select any of them. However, when a king or queen (in variants) can make a jump, the player cannot select a pawn to jump with."
(скрий) Ако искате да поздравите някого на родния му език, пробвайте нашия Речник на играча, който се намира при препратката "още за езиците", точно под знамената. (pauloaguia) (покажи всички подсказки)