Gallery images not displayed right

I have a website with Catch responsive Pro theme for the past few years and renewed my license/theme recently. Https://outsidesuburbia.com I'm using the Gutenberg block editor and the images in the gallery are not rendered correctly. When there 3 images (like the pin images at the bottom) they are displayed one below the other and not in a group of 3 as I set it up to be. Also my site always shows in mobile mode and cannot switch to desktop mode. Thanks Priya