title: Popping up a alert in front of react native Modal hangs up the application in ios
body: <p>I was trying to make some authentication system in which after click on sign up user is asked for otp. I made a modal for Otp using modal tag which only get visible when some value becomes true. Whenever user submits a otp i open up a alert box saying sign in now and change that modal visibile to false.
  But while doing this I faced a problem in Ios. This is working fine in android but while trying with ios device phone hangs up on modal screen and does not go back.</p>