title: Flutter in app purchase iOS not testable in testfly?
body: <p>I have already an iOS app in production, but I have change a little the purchase part. I don't remember or found if it's normal that I can't test a purchase in testfly or in debug mode/release mode.</p>
  <p>The id purchase is detected and the product is display. My purchase test work on Android when I clic on the product, I see pop up to test a purchase. But on iOS when I clic on product I have nothing. In debug the purchase is call but no pop up to validate purchase to test, and no more information about errors.</p>
  <p>sandbox is activated
  sandboxTesting=true;</p>
  <p>On my device setting-&gt; itunes Store and app Store-&gt; I have my app id add in sandbox</p>
  <p>In app purchase is add on xcode signing and capabilities</p>
  <p>Other observation I remember that before I had pop up to add user id and password to connect, I now I don't know why, I don't have the apple connect pop up.</p>
  <p>The only things I did, is to try to upgrade flutter, and downgrade ( because some bug) to return to initiale version who is in production. I even try to return to the initial flutter release ( who expected to work) and I have same problem...</p>
  <p>I try to create a new flutter projet to test purchase example from flutter package, and use my current bundle id to display my product. It's display but I have same problem : no connection pop up, no purchase pop up. nothing... but purchase is display, found, and all processus (Xcode, appstore connect, testfly .. is valid.</p>
  <p>So I'm little afraid to publish without testing.</p>
  <p>Before use time machine to backup all my mac before all this bug, I would have your opinion about this</p>
  <p>Thank you</p>