OnCostCalculation getting fired twice in a row

[Bilalkh]

I've modified the code a little bit to enable me to trigger a custom DiscountBehavior that calculates the new cost of the price on different conditions and scenarios:
1- If an Item is created
2- If an Item has been deleted
3- If a coupon code is inserted

I checked my code, and I'm only calling Yii::$app->cart->getCost(true) once. Please note I'm also trying to do it with Pjax.

[asyou99]

I have save problem. When I call with "true" I get only the first time a discount all subsequent applications are given without a discount