I managed to solve that problem - I think it should be reported as bug.
I overwrote one line of FrontControler->addColorsToProductList
FROM
$tpl = $this->context->smarty->createTemplate(_PS_THEME_DIR_.'product-list-colors.tpl', $this->getColorsListCacheId($product['id_product']));
TO
$tpl = $this->context->smarty->createTemplate(_PS_THEME_DIR_.'product-list-colors.tpl');
so it is as it was in version 1.6.0.9
and it works