onCheckProductStock event don't take price.official

[damsfx]

I'm having a group that has a discount amount customersGroup.

When I display a product in the frontend, the price is displayed with its discount, and the old price in red.
Then, when the onCheckProductStock event is triggered, the price's partial is refreshed

oc-mall-plugin/components/Product.php

Line 773 in 3e45399

'.mall-product__price' => $this->renderPartial($this->alias . '::price', $data),

)
but the old price no longer appears.
In the price's partial, price is set with {% set price = price|default(item.price()) %}

At the windows load :
a OFFLINE\Mall\Models\ProductPrice model is used with official property.

At the onCheckProductStock event :
a OFFLINE\Mall\Models\Price model is used with no (set to null) official property.

Can somebody confirm this behavior?