UE4.7.5 + iOS 8.3 crash on multitouch

My app writes debug messages on screen for events IE_Pressed, IE_Released and IE_Repeat (UInputComponent::BindTouch). Everything works well for single touch, but crashes on second touch; no debug messages at all for FingerIndex==1. It also works well when I run in in UE4 editor using UDK Remote for touch input. Has anyone encountered the same problem?

The app runs on iPad3 and the package is built using UnrealRemoteTool running on OS X Yosemite 10.10.3.

Sorry guys. It turned out that I also did UInputComponent::BindTouch(EKeys::Gesture_Pinch) by mistake and I did something stupid there (FString related) which crashes in iOS but not Windows. The problem is now gone.