Change quantity in cart clears the cart

[bambamboole]

I have a problem with this extension.

When I add a product to the cart it works (almost every time :-D) but when I increase the qty in the cart from 1 to 20 , the cart becomes empty. But when I hit the + button to increase the quantity it works!

Does anyone knows how to solve the issue?

Magento Version: 1.9.2.4
Turpentine Version: 0.7.3

cheers
bambamboole

[bambamboole]

ok I found out that the bug was not related to Varnish. Closed.