---
title: "Comment by mno tao on \"Okta Identity Engine CORS Errors: Understanding “Failed to fetch”\" | Hashnode"
description: "The point about cached preflights is easy to miss: an attempt with no new OPTIONS entry looks like \"no preflight needed\" at first glance. When you need to pin d"
url: "https://hashnode.com/posts/okta-identity-engine-cors-errors-understanding-failed-to-fetch/6ad88ad57fe08c2a0fd1856f/comment/6ad97660d1d48ad435f7334d"
---

[Discussion](https://hashnode.com/posts/okta-identity-engine-cors-errors-understanding-failed-to-fetch/6ad88ad57fe08c2a0fd1856f)

Comment [Okta Identity Engine CORS Errors: Understanding “Failed to fetch”](https://hashnode.com/posts/okta-identity-engine-cors-errors-understanding-failed-to-fetch/6ad88ad57fe08c2a0fd1856f)

[mno tao](https://hashnode.com/@dancermno)

[Oct 22](https://hashnode.com/posts/okta-identity-engine-cors-errors-understanding-failed-to-fetch/6ad88ad57fe08c2a0fd1856f/comment/6ad97660d1d48ad435f7334d)

The point about cached preflights is easy to miss: an attempt with no new OPTIONS entry looks like "no preflight needed" at first glance. When you need to pin down the stage, do you reproduce in a fresh profile or private window so the preflight cache starts empty, or is there a more reliable way to tell from the original capture?

Agree on keeping replacement origins consistent too. Anonymizing two same-origin hosts into different placeholders would invent a CORS problem that was never there.