Preventing or managing interview cancellation due to applicant status update

Was wondering if any iRecruitment users would share ways they are using to prevent interviews from being cancelled due to the applicant status being updated before the interview is marked as completed?  A high percentage of our interviews (it seems like most actually) end up showing as Interview Cancelled because managers reject the applicants before they've marked interviews as completed and entered their feedback.  Then there's no way to update the interview once it's cancelled.  There is that big fat warning message that any interviews will be cancelled if you change their status but people have gotten really good at