In a recognition type of card, there is a hiragana at the backside of the card, instead of the kanji I put. I added this card in Android at first, noticed the error, then edited it on desktop (Linux), but the problem persisted. The picture explains my problem:
It may be a bug, or am I doing something wrong?
My card design has an “Example” field apart from the usual, however, it works fine in other notes.