Client side routing not working

[mig-hub]

Hello, I am having a hard time with something.

I have created many websites with svelte+sveltekit that include page transitions, both before and after runes (svelte 5). And on my recent website I cannot make it work because the client side routing does not seem to work. I actually have a recent other website that is very similar. I keep comparing them and don't understand what would be different.

• They both use svelte 5, sveltekit 2 and vite 6.
• I use the static adapter on both.
• I set the ssr and prerender contants to false in both +layout.js.
• I implemented the same mechanism with a fade and a #key on data.pathname which comes from what my layout load function.
• Everything else works fine in both of them.

As far as I can tell, the only significant difference is the specific versions for each library.

The website which works has these packages:

├── @portabletext/[email protected] overridden
├── @sanity/[email protected]
├── @sveltejs/[email protected]
├── @sveltejs/[email protected]
├── @sveltejs/[email protected]
├── @sveltejs/[email protected]
├── [email protected]
├── [email protected]
├── [email protected]
└── [email protected]

And the new one which does not work has these packages:

├── @portabletext/[email protected]
├── @sanity/[email protected]
├── @sveltejs/[email protected]
├── @sveltejs/[email protected]
├── @sveltejs/[email protected]
├── @sveltejs/[email protected]
├── [email protected]
├── [email protected]
├── [email protected]
└── [email protected]

The reason why I know the new one does not have the client side router work is because I $inspect the data.pathname and each time I change page, it refreshes and adds a single init value to the logs.

I would be grateful if anybody could help me find out what the problem is.

Thank you in advance.