VAT not recalculated when changing productamount in backend

-- HikaShop version -- : 4.6.2
-- Joomla version -- : 3.10.11
-- PHP version -- : 8.0.24

Hi,

When I add a product to any order in the backend and than change the amount of that product (with pricelimits) the price is recalculated but the VAT is not. See screenshots.