JSON import results in history being updated as "Anonymous user"

Issue Summary

 
After JSON import, issues successfully get created and when checking the history of the issue, we see that the "Rank" is being updated by the Anonymous user, which is a concern to find who is the "Anonymous user".

Steps to Reproduce

1. 
   External system import -> choose Json
2. 
   Upload the JSON file
3. 
   Once the import completes successfully, check the issue history and you will find the rank field being updated by "Anonymous user".

Expected Results

The user name should be displayed or if this is Jira system, then some relevant user ID should be updated rather using the term "Anonymous user".

Actual Results

As highlighted, the Rank is updated by "Anonymous user".
 

Workaround

Currently there is no known workaround for this behavior.