The 4.13.2 Hotfix is now live! This hotfix resolves 3 critical issues with the 4.13 release.
Feel free to discuss this release on the 4.13 Forum thread.
Fixed in 4.13.2
Fixed! UE-37704 Crash opening packaged project on iOS
Fixed! UE-37249 MallocPoisonProxy can result in a memory stomp for aligned allocations in Debug and Development
Fixed! UE-36573 Need to update to libpng for Android; current one triggers security alert on Google Play