c-form-feedback component not displayed with cFormPassword input

[bernik1980]

I have the following input group, to let the user specify a password:

<c-input-group>
  <input cFormControl cFormPassword id="password" formControlName="password" [valid]="isFormControlValid('password')" />
  <c-form-feedback [valid]="false">Please specify a valid password.</c-form-feedback>
</c-input-group>

isFormControlValid() just checks if the control is valid and if it was touched.

The related formGroup looks like this:

itemForm = new FormGroup({
  password: new FormControl('', [Validators.required, Validators.minLength(8)])
})

If the input of the user is invalid (no input or less then 8 chars), the border of the input becomes red (which is of course correct), but the c-form-feedback is not displayed.

If i remove the cFormPassword directive, the c-form-feedback is displayed.