Is this an issue in Gitlab API for searching issue?

I created an issue with the name testissuecreated. On searching it using this API (source) through Postman, I am not able to get my issue. Even when I log out from my account, the issue is not visible from the Gitlab search bar. Do I need to do some changes in the project to make issues visible globally? (Note: Project is already public). The same case is happening in the project search API (source).

On changing the value of the project filter, my issue is not visible.

Getting the below response from the API

Issue link