HMR for react components fallbacks to full page reloads after touching astro.config.mjs

[mastertheblaster]

Astro Info

Astro                    v5.16.4
Node                     v20.19.1
System                   Linux (x64)
Package Manager          unknown
Output                   static
Adapter                  none
Integrations             @astrojs/react

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

I’m using a simple React component in an Astro page like this:

<Counter {...someProps} client:only="react">
	<h1>Hello, React!</h1>
</Counter>

Initially, when I modify the Counter component, HMR correctly updates only that component.
However, after I edit and save my astro.config.mjs file, Astro restarts and shows:

Configuration file updated. Restarting...

From that point on, any change to the Counter component triggers a full page reload instead of a partial HMR update.

What's the expected result?

I am not really sure if it's a bug or feature. But i would expect partial HMR updates to work.

If this turns out to be a bug and you can point me in the right direction, I’d be happy to open a pull request.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-dudegih8?file=src%2Fpages%2Findex.astro

Participation

• I am willing to submit a pull request for this issue.

[Tamaarine]

Having the same issue.