Preloading mounts incorrect page

[dangodai]

Describe the bug

Preloading causes the wrong page to be mounted if you preload a page and then click a link to the page you are already on.

Reproduction

REPL: https://www.sveltelab.dev/6wio069s34y6vm7?files=.%2Fsrc%2Froutes%2F%2Blayout.svelte

1. When you are on /, hover the link to page 2 to preload it.
2. Click the link for page 1 (/) and observe that page 2 gets mounted, despite the route not changing

Logs

System Info

System:
    OS: Linux 6.17 Arch Linux
    CPU: (12) x64 AMD Ryzen 5 2600 Six-Core Processor
    Memory: 5.65 GB / 15.54 GB
    Container: Yes
    Shell: 5.3.3 - /bin/bash
  Binaries:
    Node: 22.17.0 - /home/yung/.nvm/versions/node/v22.17.0/bin/node
    Yarn: 1.22.22 - /usr/bin/yarn
    npm: 10.9.2 - /home/yung/.nvm/versions/node/v22.17.0/bin/npm
    pnpm: 10.13.1 - /home/yung/.local/share/pnpm/pnpm
  Browsers:
    Chromium: 142.0.7444.134
    Firefox: 144.0.2
    Firefox Developer Edition: 144.0.2
  npmPackages:
    @sveltejs/adapter-auto: ^7.0.0 => 7.0.0 
    @sveltejs/kit: ^2.48.5 => 2.48.5 
    @sveltejs/vite-plugin-svelte: ^6.2.1 => 6.2.1 
    svelte: ^5.43.6 => 5.43.6 
    vite: ^7.1.10 => 7.1.12

Severity

blocking an upgrade

Additional Information

No response

[dangodai]

Possibly related or the same bug: #14902 and #14931