Hey @Kimo, sorry for the trouble about Tsurukame.
(Thanks @WaniConti for stepping so quickly in and forwarding to the Tsurukame thread!)
I’ll explain the situation about Tsurukame below, but first
Where to post Tsurukame issues
Me as an example, I have only turned on notifications for the Tsurukame thread. Basically, whenever you post a question there I get an email, but creating this thread I do not and likely oversee it (in fact, I just saw it now 10 hours later because somebody told me…). Luckily, in the Tsurukame developer thread there’s a lot of helpful durtles that try to answer every concern, and I don’t think there have been cases where a question got overlooked yet 
It’s also easier for the Tsurukame developers to track issues at a central location.
Regarding your issue
The bug is known and has been already fixed in the latest version. Very unfortunately, however, the update got rejected by Apple during the AppStore review. 
davidsansome is currently doing all he can so that Apple makes a re-review of the update. But that might still take a while.
If you cannot wait for the update to be released on the AppStore, you can already install it using Apple’s TestFlight system:
WARNING: Don’t install TestFlight builds carelessly. A malicious developer could do all kinds of stuff, so you should only install TestFlight builds if you trust the developer. In a general sense, also be advised that TestFlight builds are more likely to have bugs.
The other option is to just wait and do reviews in the meantime on the official WaniKani webpage.
If there is more issues regarding Tsurukame, please let the developers know in the Tsurukame thread