Missing User name on logged JIRA Worklog

Hi Guys,
I am facing an issue In my JIRA. I have logged the hours under a jira issue few days back. but right now its showing Anonymous logged . So I having the issue in my Issue Rest API . because I am not getting Author & Update Author Because of it. Could anybody tell me why the worklog is showing as ‘Anonymous Logged’

Thanks

Hey Suraj,

Our team is looking into it and will get back to you on this.

Thanks.