mat-selection-list clears FormControl value when it is removed from view

[mko0]

What is the expected behavior?

Component mat-selection-list shouldn't change FormControl value when it is removed from view.

What is the current behavior?

Component mat-selection-list clears FormControl value when it is removed from view.

What are the steps to reproduce?

Material 7.1.1 (version i'm using)
https://stackblitz.com/edit/test-angular-mat-selection-list-7-1-1
Material 7.3.7 (latest)
https://stackblitz.com/edit/test-angular-mat-selection-list-7-3-7

1. Open stackblitz console window
2. Click "Select All" button
3. Click "Toggle View" button
4. Observe FormsControl.valueChanges logs when mat-selection-list is removed from view:

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular 7.x.x
Material 7.x.x

Is there anything else we should know?

I don't think so.

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