During reviews, if one enters the kun’yomi reading when WaniKani wants the on’yomi reading, it displays the message “WaniKani is looking for the on’yomi reading.” Recently this message has started displaying with the wrong z-index, causing it to render below the buttons and get cut off. (See picture below.)
It looks like you guys attempted to fix this by setting the z-index of #answer-exception to 1000. However, this does not work because the buttons are in a different stacking context compared to #answer-exception. In order to fix this, you need to change the z-index of an ancestor of #answer-exception that is in the same stacking context as an ancestor of the buttons. For example, changing the z-index of #question from 10 to 11 fixes this without causing any obvious problems.
I don’t know how to read this stuff, but my spontaneous thought was that it was due to the Confetti-script as the bug manifested on a burn item. (thankfully I got 知 sent to durtle heaven later! ^^)
I hope this helps you with identifying the problem!
(it also matches the timeline for me also, as I’ve never seen this bug before, but rather recently I installed that script)
I don’t see anything obvious in the console that would be related. The console mainly shows javascript related stuff, whereas the immediate cause of this issue is what they set the z-index property to in CSS. It’s possible to actually see the CSS that causes the issue by going through the stuff related to the buttons and popup in the inspector tab.
I made sure to completely disable user scripts when I tested, so it is not user script related.
I’m also posting this as a direct reply to @arlo’s comment to make sure he sees that the issue still occurs with all userscripts completely disabled, in case he only gets notifications when his comment is replied to directly.