From a UX perspective, it is consistent with how, by default, other forms work. You're able to refresh the browser or hit the back button to navigate away from normal forms without warning and losing any field changes.

My approach is usually to provide some form validations via javascript. So if the user adds a record or if they modify existing fields on the page, set a variable in JS. If the user navigates away from the page before saving, then show them an alert to prevent leaving the page on accident.