Summary

Updating an issue remainingEstimate value using REST API calls also updates the originalEstimate to the same value. Setting originalEstimate updates remainingEstimate also

Steps to Reproduce

1. Add Time Tracking field to the Edit Issue screen for the project the issue you want to update belongs to
2. Run the following REST API call to update the remainingEstimate value:

    curl -D- -u EMAIL:PASSWORD -X PUT --data "{\"fields\":{\"timetracking\":{\"remainingEstimate\":\"3d 1h\"}}}" -H "Content-Type: application/json" http://INSTANCE/rest/api/latest/issue/issuekey
   

Expected Results

Only the remainingEstimate value is updated

Actual Results

Both, originalEstimate and remainingEstimate are updated to the same value:

      "timetracking":{  
         "originalEstimate":"3d 1h",
         "remainingEstimate":"3d 1h",
        ....
      },

Workaround

Set both, originalEstimate and remainingEstimate. This way it works fine:

• REQUEST BODY:

  {
  "fields": {
  	"timetracking": { 
  		"remainingEstimate": "55m",
  		"originalEstimate":"2h"
  		}
  	}
  } 
  

• RESULT:

    [......]
        "timetracking":{  
           "originalEstimate":"2h",
           "remainingEstimate":"55m",
           "originalEstimateSeconds":7200,
           "remainingEstimateSeconds":3300
        }, 
    [......]