I want overall field security when my issues are in the "in-progress" states. I have three of them, IN-WORK, FINISHED, and VERIFY. For each state I set the state property "jira.issue.editable=false".
When transitions into each of those states occur, I have created transition screens to allow edits. In each screen, the Attachments field is available. When I make any field edit on those screens, the change is saved and visible after the transition except for adding attachments. I see the attachment upload progress bar. So, it appears to work, but after the transition is finished and the VIEW screen is displayed, the attachment is not visible.
I'm sure if I removed the state property, the attachment(s) are going to show again.
This seems to be a bug where attachment are not being save in the transition screen or during the transition processing as the other fields.