Per default the automatic Non-Design growth is activated, thus all Non-Design Spaces grow a little bit beyond their boundaries to ensure a trouble-free and clean intersection. This is done with an automatic detection of Non-Design faces. Sometimes this can lead to issues. With the Advanced User Settings the automatic Non-Design growth can be deactivated.
If Machining Allowances are applied, the automatic Non-Design growth can be disabled. The Machining Allowance also ensures also a trouble-free intersection to create all the needed functional surfaces.
...