I was studying words from a custom list in the Skritter Japanese Android app, but it wouldn’t add 皺 (しわ ‘wrinkle, crease’), 硝子 (ガラス ‘glass’), 絨毯 (じゅうたん ‘carpet’), and 捻る (ひねる ‘to twist’) to the queue after I had learnt them in learning mode. I saw on the desktop that these are all marked “Uncommon,” so I checked the settings, and indeed the “Learn uncommon kanji” setting was turned off. So, I activated it and thought that’d be the solution. But it still won’t add these words to my review queue in the app, and I can’t seem to be able to add them on the desktop either.
This seems similar to a forum post made in June 2017, but unlike them, I actually do want to learn the kanji for these words.
Does anyone know a solution to my problem? Thanks.