When on the Submit Incident (Advanced) form a user accidentally clicks ‘Resolve’ button, returning to the main form by clicking 'Cancel' button will require the Resolution to be filled. This can be a problem because Incident will have resolution filled when it should not or does not have a resolution.
ServiceDesk 8.1 RU6
This issue has been reported to Engineering to get this fixed in a future version.
Since this is a problem in one of the customizable projects and can be fairly easily fixed: