I’ve linked the form to the URL I want it to redirect to.
On the test page on the same browser (chrome) the form redirects
On another browser (brave, firefox) and Chrome incognito, the form redirects to a different page but with the URL linked to the form (this is illegal and not supposed to be).
Problem is in your blog single page url, you are trying to link your blog posts directly to the root of your website, which is something we first time see that someone is trying to do, and never thought of it before.
We will wait for Dejan to see if he can solve this for you, if not, solution is to have your blog posts under some url, such as /post/:slug
We fixed it on our side, nothing was changed on your website. So as Dejan told you before, you just keep your blog single at the last place in your pages list, and it will work