Transitions break when wrapped in component.

[ptrxyz]

Describe the bug

If a transition is wrapped into a component, it seems to break (no, |global doesn't fix it).
I have this page:

<script lang="ts">
	import Backdrop from './Backdrop.svelte'

	import { fade } from 'svelte/transition'

	let showTheThing = $state(false)
</script>

<button onclick={() => (showTheThing = !showTheThing)}>Toggle</button>

{#if showTheThing}
	<div transition:fade={{ duration: 2000 }}>
		Element
	</div>
	<Backdrop></Backdrop>
{/if}

with this Component:

<script lang="ts">
	import { fade } from 'svelte/transition'
</script>

<div transition:fade|global={{ duration: 2000 }}>
	Component
</div>

(minimal example here: https://github.com/ptrxyz/svelte5-bug-transitions/tree/main)

Until Svelte5.next.96 this code made it so, that both divs were transitioning the same way. from version 97 onwards, the inwards transition for the wrapped div is not working anymore.

Reproduction

Checkout: https://github.com/ptrxyz/svelte5-bug-transitions/tree/main

• npm install
• optional: upgrade Svelte to 135 or down to 97 (version 96) works.
• npm run dev
• navigate to localhost:5173/test
• Hit the button: both div's should transition equally however the green one simply appears.

Logs

No response

System Info

System:
    OS: Linux 6.8 Arch Linux
    CPU: (24) x64 AMD Ryzen 9 5900X 12-Core Processor
    Memory: 41.44 GB / 62.70 GB
    Container: Yes
    Shell: 5.9 - /usr/bin/zsh
  Binaries:
    Node: 20.13.0 - /usr/bin/node
    Yarn: 1.22.22 - /usr/bin/yarn
    npm: 10.7.0 - /usr/bin/npm
    pnpm: 9.1.1 - /usr/bin/pnpm
    bun: 1.1.4 - ~/bin/bun
  Browsers:
    Brave Browser: 124.1.65.132
  npmPackages:
    svelte: ^5.0.0-next.135 => 5.0.0-next.135

Severity

annoyance

[ptrxyz]

Maybe one more weirdness:

current REPL (version 135) seems to be fine: https://svelte-5-preview.vercel.app/#H4sIAAAAAAAACrWQwUrEMBCGXyVGYXehbO7dtCCLb-DNeug2k-5gmoRkWpGad5emuqvo1VOY8P3M98_MNRqIvHyauW0H4CW_954XnN78MsQJDAEveHRj6JYfGbuAnurGNtQQDt4FYjPTrQKWmA5uYJs1JSi0NiKhs5vDD_x4RqM-2b3I037NZDCjBojFs3tlFbuL1BJsdWsi7A6NleLqYOVpJHKWOdsZ7F6qebtjVf0VvVneVD-6vjcgxcrm3HyLOlNp2ScVTuzqWy516gcDA1iSQuGU-8pVXNSNnQXqxAs-OIUaQfGSwgipuJwxo_9yyG_1_9J-7407taY-usE7e_H_7fqcPgBfB_mC_gEAAA==

The repo however shows the error with versions 97 to 135.

[ptrxyz]

Maybe related: #11682