Basic login tests taking extremely long to run on OS 13 iPhone vs. OS 12 iPhone

While running testNG tests on a real device, I noticed that basic actions of login and sign up are taking up to 25 mins on OS 13 iPhone XS Max when the same flows run on OS 12 iPhone take only 3-4 mins. Accessibility IDs and code is exactly the same. I have Appium version 1.15.1 iOS app code is in Swift and we write tests in Java (run via testng.xml)