Testing iOS App

I have exported the .ipa of a new build and version of my app and uploaded it to iTunes Connect. I am using TestFlight to test the app on iPhone. The app opens as normal and I am able to confirm that the code is functioning as expected. However, after approximately 3 minutes, the app automatically reloads to the start page and it reverts back to my current production app (that I am attempting to update to a newer version). I uninstall the app from my iPhone, re-install via TestFlight and the same issue occurs as above.

I have reviewed my code, and there is no reference or logic that points back to the current app in production.

Any ideas on why this would be happening?
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