I follow the forum
https://stackideas.com/forums/popups
In the default.php you submitted in js code that does not work with other JS on the page.
For example
https://www.eshop-diochi.cz/index.php?option=com_k2&view=itemlist&layout=category&task=category&id=166&Itemid=942&rating=1|5&xf_32[]=4&issearch=1
Can you please advise how to write it differently?