This is happening to me too.
Refreshing the cart seems to empty it. Did you ever find out what was causing it?
I've made a modification to the cart module:
Code:
//if (!count($arrProducts))
//{
// $this->Template->empty = true;
// $this->Template->message = $this->iso_emptyMessage ? $this->iso_noProducts : $GLOBALS['TL_LANG']['MSC']['noItemsInCart'];
// return;
//}
As you can see i've commented out the code that checks if the cart is empty. I've done this so that I can have the mini cart display even when it's empty, showing 0 items. This shouldn't cause the cart to empty though, it just detects if it's empty or not. This is the only modification I've made.
I'm using Isotope 1.3.0 rc1 with Contao 2.10.1.
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