Returning a promise updates page content on hover

[mxz7]

Describe the bug

With remote functions enabled, returning a promise from a load function will cause the page content to update just by hovering the link. Any non promise data returned from the function behaves as normal

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-q88rdgtw?file=svelte.config.js

Click one of the numbers first, then hovering over each of the other links will update the value without a navigation

Disable the experimental options in svelte.config.js to show that it works as expected with it disabled

Logs

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 20.19.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.8.2 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    @sveltejs/adapter-auto: ^7.0.0 => 7.0.0 
    @sveltejs/kit: ^2.49.2 => 2.49.2 
    @sveltejs/vite-plugin-svelte: ^6.2.1 => 6.2.1 
    svelte: ^5.46.0 => 5.46.0 
    vite: ^7.2.2 => 7.3.0

Severity

blocking an upgrade

Additional Information

Could be related to #15052 ? Both are nasty issues with preloading on hover