When I type なおすmeaning to rewrite, the box shows that I can pick the proper kanji. But when I pick it, the kanji that shows up is slightly different than what I picked. I’m thinking it’s either two forms of the same kanji, a font issue, or some sort of bug.
The same unicode character is used for both Chinese and Japanese, and unless the target language is specified somewhere, the OS (or browser) usually assumes that you are using Chinese.
In the Wanikani forums, you can specify the language to use:
Thanks everyone!
I added Japanese in the Chrome settings under Advanced → Languages (in case anyone else has the same problem) and it fixed the problem right away.