If the form data model is updated, then no matter what valid values are selected / entered, the form will always return Invalid.
Replication Procedure:
Run the sample
Click updateform button
And select any value in dropdown
And click submit
And you can see the onInvalidSubmit event is trigger
Expected: ValidSubmit event should trigger when the form validation is success
Actual: onInvalidSubmit event is trigger even when we enter a valid value