Yes a plugin called composite orders by WP CLEVER was causing the problems 🙂
https://ibb.co/wKWwr1j here is the link to screenshot of a selector field input
here is the link to the product…
https://pohistvofreya.com/izdelek/polica-cube-double/
with your wck app only last selector field MONTAŽA is used. Field STANJE is used with product atributes
…the field is still shown on the product page but the menu is empty. every single product i have uses select field, other fields such as number field are working normaly. my store is now closed…