掲示板 Forums - Detect the imposter kanji questions have bias in wrong answers

I really like the detect the imposter kanji questions as a way to test mastery now that I've gone through all the jouyou kanji. However, I noticed that the "imposter" kanji seem to always have an onyomi from the beginning of 五十音順 , so that you always see "imposter" kanji with onyomi like アン or イ. This limits the utility of these types of questions since you start to recognize all the typical imposters after doing this question type for a week or so.

I've attached a couple examples. Note it doesn't happen 100% of the time but enough that it's noticeable.