Guideline 2.1 - Performance - App Completeness
Your app crashed on iPad running iOS 12 connected to an IPv6 network when we:
Specifically, app crashed when Contact Us is tapped.
We have attached detailed crash logs to help troubleshoot this issue.
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I have reject from app review as message above but when run testing with iPad iOS 12 working normal. So what the real problem, and how to fix it?