When creating a note (from Note object) on a Salesforce record, the note will be sync to JIRA as an attachment.
Notes should not be treated as an attachment, or there should be a configuration to sync attachment without synching the attachment.
Thank you for sharing this with us. I've had a look at this and this is more of a bug than a feature request.
Therefore, I'll set this to Will not implement and create a bug on our backlog. You can reach out to our support team to get more information on the bug.
Jonathan Gan - Product Management Team