Scroll position should be remembered for intermediate pages when navigating with resetScroll=false

[TomVHPresto]

Which project does this relate to?

Router

Describe the bug

Starting on page A, if I scroll somewhere and then navigate to from pages A -> B -> C with resetScroll=false and without scrolling the page on B, the scroll position is maintained as expected. However, when navigating back to B with the back arrow, it resets the scroll position back to the top. Then going back to A remembers the original scroll position on A.

This is presumably because no scroll event happened on page B, so it didn't store any scroll position information for the entry for B at that point. I suspect when using resetScroll=false it should copy over A's scroll position entry to B when the navigation happens.

This also appears to happen when using a nested scrollable element with scrollToTopSelectors.

Your Example Website or App

https://github.com/TomVHPresto/scroll-restoration-mcve

Steps to Reproduce the Bug or Issue

1. Start on page /a
2. Scroll down some amount
3. Click any link to go to /b
4. Do not scroll on /b and click a link to go to /c
5. Click the back arrow in the browser - /b scrolls to the top of the page

Expected behavior

I would expect scroll position to be remembered for /b when going back from /c.

Screenshots or Videos

No response

Platform

• Router Version: 1.158.0
• OS: Windows
• Browser: Chrome
• Browser Version: 144.0.7559.110
• Bundler: vite
• Bundler Version: 7.3.1

Additional context

No response