This is due to our migration described in this thread: Changes coming to Netlify site URLs: .com to .app
I think you should be able to call the function at https://brave-euclid-b12d2c.netlify.app/test/1 now and get identical results.
Our team is still investigating handling PUT/DELETE’s differently; we just reviewed with a senior developer a couple hours ago and he should have news for us tomorrow.