CCV validation not working in paypal pro plugin

the CCV code field in check out page does not verify the CCV code.

I type wrong cvv code and it still processed

that field section all paypal code?

my setting:

Instant capture : Yes
Ask CCV : yes
Debug : No

That's normal.
It's not possible for HikaShop to check the CCV.
It's PayPal which will check that the CCV is valid when you finish the checkout.