I have a vocab list with two vectors turned on: kanji -> kana and kana -> kanji. However, I keep encountering an issue where kanji terms, even when all kanji is marked as "known"/no special readings interfere, will show up in the "cannot study" tab of the term list. Most recently this occurred with the terms 計る and 薬.
I suspect that this might happen when kanji terms are added to the schedule before the kanji itself has been studied. The obvious solution if this is true is simply a matter of removing and then re-adding the term once I had studied the kanji separately, which while annoying, is at least doable. This worked for 薬, but in the case of 計る, the problem persisted even after removing and re-adding the word.