issue: Unregister useFieldArray not working when value is empty array

[hendra-foo]

Version Number

7.43.6

Codesandbox/Expo snack

https://codesandbox.io/s/unregister-array-field-not-working-kemxln?file=/src/App.tsx

Steps to reproduce

1. Go to Provided Code Sandbox Link
2. Click on 'With Cart' input radio, console is logging {type: "WITH_CART", cart: Array(0)}
3. Click on 'No Cart' input radio, console will still logging {type: "WITH_CART", cart: Array(0)}
4. Click on 'With Cart' input radio again, and click 'APPEND' button once, console now logging {type: "WITH_CART", cart: Array(1)}
5. Click on 'No Cart' input radio again, console will log {type: "NO_CART"}

Expected behaviour

The cart should be unregistered when on step 3

What browsers are you seeing the problem on?

Chrome

Relevant log output

{type: "NO_CART"}
{type: "WITH_CART"}
{type: "WITH_CART", cart: Array(0)}
{type: "NO_CART", cart: Array(0)}
{type: "NO_CART", cart: Array(0)}
{type: "WITH_CART", cart: Array(0)}
{type: "WITH_CART", cart: Array(0)}
{type: "WITH_CART", cart: Array(1)}
{type: "NO_CART", cart: Array(1)}
{type: "NO_CART"}

Code of Conduct

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