Product category pages appear fine on desktop but 3 coloumns on mobile

As soon as you inspect element and set it to mobile devices you’ll notice that the product filters and listings appear in 3 column structure which is very weird.

I cannot understand why this is happening. It’s happening only on the category pages.

I use plugins from crocoblock such as Jet Woo Builder on Jupiter X theme.

Please help or else I would have to restore a previously staged version in which I would have to put in lot of work.

The page I need help with: [log in to see the link]