Pasting a screenshot while writing on the comment field will result in all the comment being lost

Summary

Pasting a screenshot while writing on the comment field will result in all the comments being lost

Tested Environment

JIRA 6.4.10
Service Desk 2.5.4

Steps to Reproduce

1. Go to a project where you are the service desk agent
2. Go to any issue in in this project (from JIRA's end, not portal end)
3. Start writing on the comment field (Don't hit Send response)
4. Now take a screenshot and then paste on the comment by hitting Ctrl + v

Expected Results

You should have the comment you have written, plus the screenshot will be uploaded and also included in the comment as !screenshot-1.png!

Actual Results

THe comment is lost. The screenshot is uploaded. However, the screenshot comment is not included in comment as !screenshot-1.png!

Notes

This works as expected in JIRA Business and Software projects.