RSC requests not cached for initially loaded route in App Router

[Xevrrer]

Summary

When I navigate directly to /test1, Next.js automatically makes an RSC (React Server Components) request once for /test2 and /test3. After that initial load, when I click between links, the RSC request repeats every time I click /test1, whereas for the other routes, it appears to remain cached.

Similarly, if I navigate directly (or refresh) to /test2, Next.js automatically issues an RSC request once for /test1 and /test3. However, clicking repeatedly on /test2 results in an RSC request every single time.

Why does this behavior occur? Why isn't the route I initially land on added to what appears to be the router's cache, resulting in a repeated RSC request each time I navigate to it again? Additionally, I've noticed that for this initial route, the RSC request includes the manifest and favicon requests, while for other routes fetched in the background, the RSC request occurs only once.

Additional information

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Example

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