Only one promise resolves when streamed from load (using Promise.resolve)

[dreitzner]

Describe the bug

I am using SvelteKit with the adapter/node.
I am connecting to an external API and cache the responses.
On the first request (no cache) I return the promises of the api calls.
All of them are resolved correctly.

On the second request (valid cache) I return the cache value wrapped in a Promise.resolve().
If I use that for only one Promise, this promise resolves in the {#await} block.
If I have more than one Promise, only the first promise resolves in the {#await} block, all others show the loading state.

Reproduction

Stackblitz: https://stackblitz.com/edit/sveltejs-kit-template-default-fgdj1s?file=src/routes/+page.server.js

the second promise never resolves

got to /only-one => everything resolves correctly

Logs

No response

System Info

Should not be relevant, as it can be reproduced on stackblitz.

  System:
    OS: Windows 10 10.0.19045
    CPU: (16) x64 AMD Ryzen 7 PRO 5850U with Radeon Graphics     
    Memory: 11.05 GB / 31.56 GB
  Binaries:
    Node: 18.12.1 - ~\AppData\Local\Volta\tools\image\node\18.12.1\node.EXE    
    Yarn: 1.22.18 - ~\AppData\Local\Volta\tools\image\yarn\1.22.18\bin\yarn.CMD
    npm: 8.19.2 - ~\AppData\Local\Volta\tools\image\node\18.12.1\npm.CMD       
  Browsers:
    Edge: Spartan (44.19041.1266.0), Chromium (110.0.1587.63)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    @sveltejs/adapter-node: ^1.2.0 => 1.2.0 
    @sveltejs/kit: ^1.10.0 => 1.10.0 
    svelte: ^3.55.0 => 3.55.1

Severity

serious, but I can work around it

Additional Information

can be worked around with a promise wrapper

const promiseWrap = <T>(value: T): Promise<T> => new Promise((resolve) => {
    setTimeout(() => resolve(value));
})