Revalidation after command not showing up consistently in the template

[Sendouc]

Describe the bug

In my testing I have found doing changes to be shown to the user on the same page inconsistent particularly when it comes to changing the properties of some object on the screen.

Reproduction

https://github.com/Sendouc/remote-functions-demo/tree/actions-submit

<script>
	import { getPost, toggleIsPublished } from '../data.remote.js';

	let { params } = $props();

	let post = $derived(await getPost(params.slug));
	$inspect(post);
</script>

<h1>{post.title}</h1>
<div>{post.isPublished}</div>
<div>{@html post.content}</div>
<button onclick={async () => await toggleIsPublished(params.slug)}>Toggle is published</button>

In this example the inspect is always consistently showing the updated object but template is not. The first update is not shown (only if you refresh the page). Following commands (after the first one) in this example are updating the template correctly.

Logs

System Info

System:
    OS: macOS 15.6
    CPU: (10) arm64 Apple M1 Max
    Memory: 3.85 GB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.17.0 - ~/.nvm/versions/node/v22.17.0/bin/node
    Yarn: 1.22.19 - ~/.nvm/versions/node/v16.16.0/bin/yarn
    npm: 10.9.2 - ~/.nvm/versions/node/v22.17.0/bin/npm
    pnpm: 10.10.0 - /opt/homebrew/bin/pnpm
    bun: 1.0.0 - ~/.nvm/versions/node/v16.16.0/bin/bun
  Browsers:
    Chrome: 139.0.7258.67
    Edge: 138.0.3351.121
    Safari: 18.6
  npmPackages:
    @sveltejs/adapter-vercel: ^5.6.3 => 5.8.0 
    @sveltejs/kit: 2.27.1 => 2.27.1 
    @sveltejs/vite-plugin-svelte: ^6.0.0 => 6.1.0 
    svelte: ^5.38.0 => 5.38.0 
    vite: ^7.0.4 => 7.0.5

Severity

blocking an upgrade

Additional Information

We have even noticed cases in our application where using an if block or not can make the update to be lost and in this case repeating the call makes no difference. I couldn't create a reproduction of this though.

[Sendouc]

Screen.Recording.2025-08-07.at.20.49.52.mov