With the same issue my app was rejected by Apple today. sign in works with real devices iPhone 8, iPhone 12 mini, iPad pro 4th gen. How is this possible, that till now with so much same bug app review rejections, Apple review team did not figured that out, that this a Xcode simulator bug?
Alexzeit
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Good news, my app has passed the review after my request to review team to test my app on real device. Many thanks to review team.