selectSignal from Component store emits undefined when using NavigationActionTiming.PostActivation and .detectChanges() and lazy loading

Which @ngrx/* package(s) are the source of the bug?

component-store, router-store

Minimal reproduction of the bug/regression with instructions

Reproduction repo: https://github.com/yurakhomitsky/component-store-issue

Steps to reproduce:

• Clone the repo
• Run the application
• Open the console and navigate to the users page

a Component store with selectSignal emits undefined when the application has the following implemented:

• Lazy loads routes with a nested component that has ComponentStore in providers.
• When the application has router-store provided with navigationActionTiming: NavigationActionTiming.PostActivation
• When the application selects router state from the selector and calls detectChanges()

With all of that, the application gets a runtime error when trying to access something from the Component store state

If you change navigationActionTiming to NavigationActionTiming.PostActivation - it works If you change detectChanges to markForCheck - it works

Expected behavior

The selectSignal method from the component store should not emit undefined if the application has the code written mentioned above

Component store does not emit undefined if using the select method that returns Observable

Versions of NgRx, Angular, Node, affected browser(s) and operating system(s)

NgRx: "@ngrx/component-store": "^19.1.0", "@ngrx/router-store": "^19.1.0", "@ngrx/store": "^19.1.0",

Angular: "@angular/core": "^19.2.0",

Other information

No response

I would be willing to submit a PR to fix this issue

• Yes
• No