Why does newly built app result in strange app volume button navigation behavior on Android 12?

Our team rebuilt our android app on Median and deployed to the Play Store this week to comply with Google's new API targets. We have a user that utilizes an old Samsung phone on Android 12 with an issue. When they press any of their volume keys, the app navigates away from the current page to an older/different view. I've been able to replicate this myself with a different physical Android 12 phone. What could be causing this?