Gitlab Changeset URL not Added to JIRA ticket

Summary

I am using Gitlab CE 11.2.1 and JIRA Cloud for our software development projects.

Recently, I noticed that the commits which has commands such as Resolves ISSUE-123 or Fixes ISSUE-123 doesn't attach the changeset URL and the commit log is not added as a comment to the JIRA ticket.

However, if I use it without the command (Eg: ISSUE-123 added condition, then the changeset URL is correctly added to JIRA.

Steps to reproduce

1. Create an issue in JIRA issue tracker
2. Add a commit with log as follows: Fixes ISSUE-123
3. Push the commit to remote server (default branch)

What is the current bug behavior?

The changeset URL is not attached to the JIRA ticket and no comment is added

What is the expected correct behavior?

The Changeset URL should be attached to the JIRA ticket and a comment should be added

Results of GitLab environment info

GitLab 11.2.1 (2d6c1c6)
GitLab Shell 8.1.1
GitLab Workhorse v5.1.0
GitLab API v4
Ruby 2.4.4p296
Rails 4.2.10
postgresql