Actual Results window is showing Jira's Attachment error when adding attachments to a previously saved step result

Steps to Reproduce

1. Enter Execution details;
2. Add an attachment to "Actual Result" and Save;
3. Refresh the page;
4. Try to add another attachment to "Actual Result";
5. Error message is displayed "Adding attachments is not supported for this screen";
6. Cancel the changes of "Actual Result";
7. Retry to add the attachment........ it will work.

EXAMPLE GIF: