I am using a class computer, and if anyone else were to send feedback on this computer they would see my private email address. If there is an available fix, please let me know. Otherwise, this is a security problem that if not fixed by release or soon after will go on my list of things to report to the school district if there are any problems that would deter them from using the Chromium-based Edge browser.
If it's a class computer then why are you signing into it using your personal Microsoft account? your school should provide a school account for you. also Edge should be managed by your school, they can disable feedback via group policy.