$navigating store not updated when form submitted

[liegeandlief]

Describe the bug

When submitting a form I would expect the $navigating store to be updated whilst the action is running.

The docs at https://kit.svelte.dev/docs/types#public-types-navigation say that $navigating.type can have the value form when a user has submitted a form.

But this never seems to be the case and $navigating remains as null whilst the action is running.

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-kcmju7?file=src%2Froutes%2F%2Bpage.svelte

Logs

No response

System Info

System:
    OS: macOS 13.4
    CPU: (10) arm64 Apple M1 Pro
    Memory: 602.34 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 18.16.0 - ~/.volta/tools/image/node/18.16.0/bin/node
    Yarn: 3.3.0 - ~/.volta/tools/image/yarn/3.3.0/bin/yarn
    npm: 9.5.1 - ~/.volta/tools/image/npm/9.5.1/bin/npm
  Browsers:
    Chrome: 114.0.5735.133
    Firefox: 114.0.1
    Safari: 16.5
  npmPackages:
    @sveltejs/adapter-vercel: ^3.0.0 => 3.0.1
    @sveltejs/kit: ^1.0.0 => 1.20.5
    svelte: ^3.44.0 => 4.0.0
    vite: ^4.0.0 => 4.3.9

Severity

serious, but I can work around it

Additional Information

No response