How to retrieve the data from linked issues on the same jira instance and other jira instance?

[Rekha, Chandra]

We are trying to retrieve the data from linked issues on the same jira instance and from other jira instance as well.
E.g., ST-6 isse is linked to to ST-13 and TEST-1. While using api, we are getting the linked issues information from TEST-1 only but not from ST-3(within the same instance).

Need help here to retrieve the linked issues data using api from both instances.
Here is the api: 

https://localhost:8080/jira/rest/api/latest/issue/ST-6/remotelink