I have some questions about the request lifecycle in middleware

[wonu]

1. According to the document Sharing Context Between action and loader, the context value set in the action phase can be used in the loader.
   I assumed that the request in the action phase and the request in the revalidation phase were separate, and thus the context would be independent for each. Is that not the case? How is this possible? (My apologies if this question sounds strange, as I'm new to this topic.)

2. I followed the example in the document, but the loader only contains the default value instead of the value set in the action. Did I do something wrong? Repro: https://stackblitz.com/edit/github-165puddz?file=app%2Froutes%2Fhome.tsx

3. Is there any point in setting the context value within the loader/action instead of the middleware?