Non-public API usage on QT 5.9 iOS

I am using QT 5.9 and want to upload my game to AppStore but i got this email after upload Received Message

Non-public API usage:
The app references non-public symbols in myGame: __ZN3WTF11OSAllocator16reserveAndCommitEmNS0_5UsageEbbb, __ZN3WTF11OSAllocator18releaseDecommittedEPvm, __ZN3WTF8pageSizeEv

I am using this in .pro file

CONFIG += c++11
QT += qml quick sql purchasing gui multimedia

any ideas how to solve it?