sveltekit:shutdown callback not being called

Describe the bug

I am trying to use the "sveltekit:shutdown" event to close some resources but it doesn't appear that the callback is being invoked when the server is sent SIGINT. The server just stops with the callback never running.

Reproduction

Simple reproduction:

Sveltekit Shutdown

Logs

VITE v6.1.0  ready in 693 ms

  ➜  Local:   http://localhost:5173/
  ➜  Network: use --host to expose
  ➜  press h + enter to show help
launching server
registering shutdown hook
initialization complete
user@computer: ~/sveltekitshutdown$

System Info

System:
    OS: Linux 5.15 Linux Mint 21.1 (Vera)
    CPU: (6) x64 Intel(R) Core(TM) i5-8600K CPU @ 3.60GHz
    Memory: 3.43 GB / 15.56 GB
    Container: Yes
    Shell: 5.1.16 - /bin/bash
  Binaries:
    Node: 20.11.1 - ~/.nvm/versions/node/v20.11.1/bin/node
    npm: 10.2.4 - ~/.nvm/versions/node/v20.11.1/bin/npm
    pnpm: 9.15.4 - ~/.local/share/pnpm/pnpm
  npmPackages:
    svelte: ^5.0.0 => 5.19.10

Severity

annoyance

Additional Information

No response

Start with the linked SvelteKit Shutdown reproduction and the sveltekit:shutdown event path, then reproduce the behavior by running the server and sending SIGINT. Done means the registered shutdown callback is invoked so resources can be closed before the server stops.