Astro Info

Astro                    v6.0.3
Node                     v22.22.0
System                   Linux (x64)
Package Manager          pnpm
Output                   static
Adapter                  none
Integrations             custom:dev-tools

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

The dev toolbar started to disappear sudendly when a custom dev tool integration is used. Removing the integration will make the dev toolbar to show again. There's also a kind of reloading the first time the project starts.

I'm not sure since what exact version started happening but it started in a minor or patch version of v5

There're also more other details that I saw in my local project but I wasn't able to reproduce them in the minimal reproduction project. For example, sometimes I saw the message [404] /@id/astro/runtime/client/dev-toolbar/astro_runtime_client_dev-toolbar_entrypoint__js.js.map in the console. Maybe it's related to #15840 as well.

What's the expected result?

The dev tool to work propertly with integrations.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-bhjaufxj

Participation

• I am willing to submit a pull request for this issue.