Quantity update in cart loosing SEF

[sscheidegger]

Hi all

I face the following problem with VM2.0.1d and J2.5.0 and as well with VM2.0.0 and J1.7.3:
When there are products in the cart and I update the quantity of one of them, the SEF address for the cart gets lost and the address is index.php?option=com_virtuemart&view=cart instead. As a consequence Joomla looses the association to my menu item "cart" and therefore the associated modules are not displayed.

A VM bug or a J bug?

Greets,
Stefan