Ghost Content API CORS Error Issue

Hello. I encountered a problem while using Ghost’s Content API.
Occasionally, when calling the Ghost Content API, a CORS error occurs.
This error occurs or doesn’t occur regardless of whether I change the API parameters.I temporarily resolved the CORS error using the following methods:

  1. Unpublishing a recently published post
  2. delete some post tag
  3. Reducing limit parameter from 50 to 20

However, the problem is only temporarily solved and keeps recurring.
What are some examples of why CORS errors occur?