掲示板 Forums - Bug bounty (free renshuu pro) - kanji marked as unknown when really known

Reward: six months of renshuu pro for a fully reproducible example of the issue.
(If you give information that leads to a fix, you'll also receive it!)

Issue: Even though a kanji appears as known (lightbulb turned on) in the dictionary, it appears as grey in a list or quiz.
Example In this case, the user knows the kanji 属, as is shown when the click the kanji and view it the dictionary. It will show with the lightbulb icon turned on.

Places where it occurs: inside of quizzes. Not known to appear in standalone lists. 

Warnings when testing: When a term is 
a)marked with a specific mastery level
b)studied for the first time (= a question is answered on it in a quiz)

The current "known" kanji is marked onto the word. After that point, the displayed kanji doesn't change unless your kanji knowledge changes.
In other words, if you see this issue appear in a quiz
a)on the "new terms in this quiz" page (this is ideal for reproducing the issue)
b)in a question

The ability to see what is causing the error will disappear if you actually answer the question for that term.

So, if you see this issue, you must
a)report to this thread, or send an in-quiz report
b)STOP studying that lesson/schedule
c)do NOT answer the question on the particular term.

This should allow me to reproduce the issue.

It's a very rare bug, but one that has been around for quite some time.

It appeared normally for you because i ran the reset script before posting the original message, which corrects all the information. That's it, unfortunately!

Not sure which one it was because I was going through fast and had already clicked 'next' by the time I noticed it, but the 当 in either 当てはまる or 当て嵌める was grey in my regular schedule today.

I think I got this bug. Reported it as well.

Did you hold on that quizzing, or continue with it?

Found the schedule. Sadly, it did not replicate when I pulled it up. 

@mysticfive - if you see it again, reload that page and then see if it changes. I have a theory to test.

Got one. It's in the "My Words" list in the study center. Definitely marked as known in the dictionary.

No. Was looking in my words for something else and found that. It's level nine (both term and kanji), so I haven't seen it for a while.

That triggered a half-dozen terms I haven't seen for a while.
Was it the bug or something else?