Help needed with correct subtotal

Hi,

We are using another plugin along with yours,

we are facing this issue

when we apply any product level discount say we changed price of product from 20$ to 10$ using dicount

the other plugin show the subtotal as 20$ only

that plugin uses this code to get the subtotal
$total = WC()->cart->get_displayed_subtotal();

is there some specific hook where we are suppose to run this function right now we are running it in side wp_ajax event