I have an app that plays a list audio files. Behind that, I have a widget that shows the text that is being played back. In local run, the text is highlighted correctly, and the app correctly scrolls to that text. But when I deploy the app to Testflight, this behavior stops working. The audio still gets played, but the relevant text no longer gets highlighted, and the widget doesn't scroll to it.
Where do I even begin to debug such error, seeing mismatch between behavior on local run vs testflight version?