Mr. Ihor Khoma found one legend about Medzhibyzh. From the category of those that "my father's grandfather saw":
The daughter of the last owner of the castle, a kind of Princess Elena, wanted to ride a sleigh in the snow in the summer. So the loving father arranged for her: they covered the castle yard with sugar, harnessed the horses to the sleigh, and voila! Locals still remember :)) https://castles.com.ua/n21n.html