Open an issue
Insert a title
Save changes
Re-open issue
Editing the title and pressing "Back to Issues" will cause a confirmation box to appear asking you if you are sure that you don't want to save, pressing "No" will make sure that the changes are not saved.
Changing the "Status" to "Rejected", adding attachments or comments will instantly save even if you press "Back to Issues" and choose "No" at the confirmation box.

Expected result: Every change made will only save if you choose "Yes" at the confirmation box

Actual results: Results are inconsistent, some values change instantly and some only change if you save the changes.