RootRoute pendingComponent after "lane match loader rewrite" always visible

[codeart1st]

Which project does this relate to?

Router

Describe the bug

Before the latest "lane match loader rewrite" the pendingComponent from the RootRoute was only visible in the first load of the SPA. It was not visible during route transitions after the initial application load.
After the rewrite it's not possible anymore to have a initial pendingComponent, but not use it afterwards.

Complete minimal reproducer

https://stackblitz.com/edit/github-s5suhk5r-9udezxgo?file=src%2Froutes%2F__root.tsx

Steps to Reproduce the Bug

1. The blue pendingComponent from index.html is shown
2. The blue RootRoute pendingComponent is shown
3. The start page is shown
4. Navigating to the "About" page
5. The RootRoute pendingComponent is shown again

Expected behavior

The pendingComponent of the RootRoute is shown only once during initial SPA load.

Screenshots or Videos

No response

Platform

• Router / Start Version: @tanstack/react-router@1.170.19

Additional context

No response

[Sheraff]

out of curiosity, why do you expect it to behave differently on 1st load vs subsequent navigations? Why is that the desired behavior?