Update Cart (Eshop 1.4.1) does not work (UPDATE)

Hi,

Running Joomla! 3.4.3 + Eshop 1.4.1.

I see some nice new layouts for the cart, that's great.
However, the Update Cart button doesn't seem to work.




After pressing the + sign to add more products and then pressing 'Update Cart' I don't see any changes.
Except the message 'This product will be removed from cart', which should not be shown at this moment.

Product removal via X doesn't work either.

I did not see any error messages in Firebug, so I don't know what's going on here.

Same counts for the Cart view, doesn't work either.

Please ignore styling issues. What could be wrong here?


-- UPDATE --
It seems to be a caching problem, I discovered.
I'm using the standard Joomla! caching mechanism and the NoNumber Cache Cleaner plugin.
Turning them both off seems to solve the mentioned problem.

Now removing and/or updating products from the cart works fine.

However, I like to work with Joomla!-caching. It there a solution for this?


Best regards,
Burt