Issue Summary

When pasting a screenshot in a comment box using Text mode in board view, the comment box and its content disappeared. However, the attachment will be successfully attached.
This issue is not observed in Visual mode or when pasting a screenshot in a comment box in issue view.

Steps to Reproduce

1. Navigate to Backlog View of an issue.
2. Add a comment in Text mode, then paste an image from the clipboard using ctrl+v.
3. Attach screenshot dialog box pops up, with the option to enter a file name.
4. After hitting the "Upload" button, The message "The files have been attached to xyz issue" will appear as a floating message.

Expected Results

The comment box stays for further edits with the message and pasted image in thumbnail form. 

Actual Results

The comment box and its contents disappears completely.

Workaround

Paste the screenshot in Visual mode or in full issue view.