Form controls are not shown - very annoying bug

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

forms

Is this a regression?

Yes

Description

Let’s say I have a reactive form and I have a switch which shows/hides some dependent inputs. But when for those dependent inputs FormControls are not defined, those controls do not show up on the UI. And THERE IS NO error, which is really annoying!

See the stackblitz. On the form, click on a [Have Plates] button.

To see the problem in code, open app/components/form-view.component.ts and see my comment.

The problem is the error:

Cannot find control with name: ‘licPlatesHowMany’

only shows up in the console when the project is running in the stackblitz, but it does NOT show up when running the project locally (ng serve)! It was really hard to find! Please make sure the error is ALWAYS generated in the console.

Please provide a link to a minimal reproduction of the bug

https://angular-ivy-1vwhz7.stackblitz.io

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

see the stackblitz

Anything else?

No response

[KingMario]

Downloaded it and run with ng serve. While click [Have Plates] button got the error:

main.js:1 ERROR TypeError: Cannot read properties of null (reading '_rawValidators')
    at _E (main.js:1:152821)
    at Cg (main.js:1:167147)
    at Sc (main.js:1:165992)
    at n.addControl (main.js:1:173621)
    at n._setUpControl (main.js:1:176621)
    at n.ngOnChanges (main.js:1:175969)
    at n.Wk (main.js:1:20640)
    at yI (main.js:1:24973)
    at Uy (main.js:1:24774)
    at Ou (main.js:1:24494)

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