Gitlab for Jira Cloud App connectivity error between Gitlab and Jira

Problem to solve

The requests from Jira to our Gitlab instance are failing with timeouts (https:///-/jira_connect/oauth_application_id), despite having whitelisted the IPs present in the Atlassian documentation. This works intermittently, and if we open connectivity widely, it works.

The configuration was done following the documentation, and since it works intermittently, I can say there is no configuration problem.

Has anyone faced anything similar?

Thank you!

Steps to reproduce

Sign in to Gitlab for Jira cloud app in Jira

Configuration

Followed the documentation here GitLab for Jira Cloud app administration | GitLab Docs

Versions

  • GitLab CE 17.8.7 Self-managed