Price filter issue with Variable product

Hello,
I’ve tried creating the variable products, but with the Price filter does not filter from the lowest price of those products created. It’s seem like it start filtering from the highest price of each variation. >> https://prntscr.com/ez7aif

and here is the link for the page >> https://www.triodecor.com/product-category/hot-promotion/bed-hotsale/

Do you have any suggestion for setting on this?

Thank you in advance !