There is a script running on your site which is commandeering the Pinterest button. It looks like it’s the dialog (lightbox) script from the Elementor plugin, maybe–when I disable that and the Elementor frontend script (I had to disable both because something in the frontend script requires the dialog script), the button properly links to Pinterest.
I did a quick search and the docs say “The lightbox will automatically work on any link that leads to an image file“. The Pinterest sharing button does contain the image URL, so that may be what’s causing it, but it should not be doing this. You can try disabling the lightbox if you do not need it, or you might reach out to the Elementor support and ask how to prevent the lightbox/dialog behavior on a link which contains an image URL, but is not linking directly to an image.
