Spellcheck and autocorrect are disabled when Coffeeshop Mode is on. (although, IIRC, you can override that) Another reason: autocorrect/autocomplete can trigg

Spellcheck and autocorrect are disabled when Coffeeshop Mode is on. (although, IIRC, you can override that) Another reason: autocorrect/autocomplete can trigger visible previews/highlights on the screen. (thinking about this out loud here: what about IME/pinyin? That works well in both modes, it's necessary)