Describe the bug

Having 2 chained async calls inside the top level of a page it works when navigating on the page.
Then after saving the page it will beak with this error:
Uncaught (in promise) TypeError: Cannot read properties of null (reading 'increment')

Reproduction

https://github.com/simonhackler/svelte-async-repro

run npm run dev
navigate to localhost:5173 and everything should work. Then delete or add a line inside src/routes/+page.svelte and save and it will lead to this error:
Uncaught (in promise) TypeError: Cannot read properties of null (reading 'increment')

Logs

System Info

System:
    OS: Linux 6.14 Arch Linux
    CPU: (6) x64 Intel(R) Core(TM) i5-9600K CPU @ 3.70GHz
    Memory: 15.87 GB / 31.26 GB
    Container: Yes
    Shell: 5.2.37 - /bin/bash
  Binaries:
    Node: 22.17.1 - ~/.nvm/versions/node/v22.17.1/bin/node
    npm: 10.9.2 - ~/.nvm/versions/node/v22.17.1/bin/npm
  Browsers:
    Brave Browser: 134.1.76.74
  npmPackages:
    svelte: ^5.0.0 => 5.36.8

Severity

annoyance