Error "Could not get the request store" when invoking `*.remote` from helper

Describe the bug

I have the following code:

+page.svelte

<script lang="ts">
  import {something} from './something'
</script>

{something}

something.ts

import {getSomething} from './get-something.remote'
export const something = await getSomething()

get-something.remote.ts

import {prerender} from '$app/server'
export const getSomething = prerender(() => 'test')

This leads to an error:

[500] GET /
Error: Could not get the request store. This is an internal error.
    at get_request_store (file:/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/@sveltejs/kit/src/exports/internal/event.js:74:9)
    at eval (node_modules/@sveltejs/kit/src/runtime/app/server/remote/prerender.js:96:72)
    at wrapper (node_modules/@sveltejs/kit/src/runtime/app/server/remote/prerender.js:156:5)
    at eval (src/routes/something.ts:6:63)
    at async ESModulesEvaluator.runInlinedModule (file:/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/vite/dist/node/module-runner.js:930:3)
    at async SSRCompatModuleRunner.directRequest (file:/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/vite/dist/node/module-runner.js:1137:59)
    at async SSRCompatModuleRunner.directRequest (file:/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/vite/dist/node/chunks/dep-Bm2ujbhY.js:18727:22)
    at async SSRCompatModuleRunner.cachedRequest (file:/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/vite/dist/node/module-runner.js:1055:73)
    at async eval (src/routes/+page.svelte:5:31)

The error does not occur when invoking getSomething directly in the component.

Reproduction

Repro

System Info

Svelte 5.39.5
SvelteKit 2.43.2

Severity

blocking an upgrade

Start with runtime/app/server/remote/prerender.js and internal/event.js, especially the stack-trace paths through get_request_store and the prerender wrapper. Run the linked SvelteLab reproduction with the listed SvelteKit and Svelte versions, comparing helper invocation with direct component invocation. Done means the helper case no longer raises the request-store error while direct invocation remains functional.