issue: register/unregister should affect isDirty in formState

[yslpn]

Version Number

7.51.3

Codesandbox/Expo snack

https://codesandbox.io/p/devbox/amazing-mahavira-29tzmd

Steps to reproduce

1. Click Submit, and we receive a message in alert
   {"data":{"firstName":"Ivan","lastName":"Ivanov"},"isDirty":false}

2. Click button unregister lastname field

3. Click Submit, and we receive a message in alert
   {"data":{"firstName":"Ivan"},"isDirty":false}

Expected behaviour

In our project, we often come across a situation where we have an optional field. We register it or unregister using the checkbox. We don't want to store the checkbox state in the form and want to disable the sumbit button when the data hasn't changed.

We are faced with the fact that we have unregister/register fields, the data that goes into the submit function changes, but the form is not considered isDirty.

Should we change the behavior for isDirty in the library or do we need to create a new field?

What browsers are you seeing the problem on?

Chrome

Relevant log output

No response

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