Greasy Fork镜像

Script is disabled most of the time when I start reviews, I have to reload the page and turn on/off the script a couple times to get it working.

I am seeing this issue as well

Please post in the WaniKani forums Double-Check thread: https://community.wanikani.com/t/userscript-double-check-version-2x/31456
It's a lot easier to communicate there.

My first suggestion would be to make sure you have WaniKani Open Framework as the #1 script in TamperMonkey (or whatever script host you use). That's the only reason I'm aware of that it sometimes starts / sometimes not.