+page.svelte should not load data from parent +page.server.ts

Describe the bug

Lets say I have the following project structure:

If I navigate from the shop page to the product page and then back to the shop page, the product page gets the data from the shop load function before navigation to the shop page.

The product page should not get the load data from the shop page.

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-stp9cyxx?file=src%2Froutes%2Fshop%2F%2Bpage.server.ts

Logs

Navigating to shop page: shop {load: 'shop'}

Navigating to product page: shop {load: '[product]'}
product {load: '[product]'}

Navigating back to the shop page: product {load: 'shop'}
shop {load: 'shop'}

System Info

System:
    OS: macOS 26.3
    CPU: (12) arm64 Apple M2 Max
    Memory: 380.69 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.11.0 - /Users/frankherzog/.nvm/versions/node/v24.11.0/bin/node
    npm: 11.10.0 - /Users/frankherzog/.nvm/versions/node/v24.11.0/bin/npm
  Browsers:
    Chrome: 145.0.7632.76
    Firefox: 146.0.1
    Firefox Developer Edition: 145.0
    Safari: 26.3
  npmPackages:
    @sveltejs/adapter-node: ^5.5.2 => 5.5.3 
    @sveltejs/kit: ^2.50.2 => 2.53.0 
    @sveltejs/vite-plugin-svelte: ^6.2.4 => 6.2.4 
    svelte: ^5.51.0 => 5.53.3 
    vite: ^7.3.1 => 7.3.1

Severity

serious, but I can work around it

Additional Information

No response

Start with the linked StackBlitz reproduction and inspect src/routes/shop/+page.server.ts alongside the logged navigation sequence. Verify the transition from the shop page to a product page and back, then confirm that the product page no longer receives the shop load data before navigation completes.