@florentine3d Suspicious line is https://github.com/ncsoft/Unreal.js/blob/master/Plugins/UnrealJS/Source/V8/Private/JavascriptContext_Private.cpp#L485 I think I have omitted copying value. 
@florentine3d Suspicious line is https://github.com/ncsoft/Unreal.js/blob/master/Plugins/UnrealJS/Source/V8/Private/JavascriptContext_Private.cpp#L485 I think I have omitted copying value.