Why order_vendor_price does not update?

-- HikaShop version -- : 3.0.1
-- HikaMarket version -- : 1.7.3
-- Joomla version -- : 3.7.1
-- PHP version -- : 5.6

Hi,

I would like to understand why when I edit the price of a product within the confirmed parent order then the field order_vendor_price does not get updated

Example:

Step 1. New order created and confirmed H1X81

- Vendor order view from Vendor control panel. User Total is 30 Euros and Vendor Total is 28.4 Euros → screenshot 1
- Vendor CSV Order export. order_full_price = 30 & order_vendor_price = 28.4 → screenshot2

Step 2

- Site Admin edits product pricing in Parent order → screenshot3
- Siet Admin puts new values as Unit price and Vendor Unit Price in the product (20%) → screenshot4

Step 3

- Vendor order view from Vendor control panel. User Total is 6 Euros and Vendor Total is 5.68 Euros → screenshot 5
- Vendor CSV Order export. order_full_price = 6 & order_vendor_price =28.4 → screenshot6

Now Vendor Total in order view from Vendor Control Panel and order_vendor_price from order CSV export DO NOT match.

This seems a problem, please explain, thanks!